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98-613: Original models of the Sord M5 are relatively small by home computing standards, with a built-in keyboard with rubber keys, similar to the ZX Spectrum , which is also sold in many countries such as the United Kingdom itself, Ireland , Spain , the Netherlands , Singapore , Malaysia , Sweden , Norway , Denmark , Canada , New Zealand , Australia , Greece , Israel and Hong Kong as

196-457: A word processor , web browser or social media app. Touchscreens use virtual keyboards . Typewriters are the definitive ancestor of all key-based text entry devices, but the computer keyboard as a device for electromechanical data entry and communication largely comes from the utility of two devices: teleprinters (or teletypes) and keypunches . It was through such devices that modern computer keyboards inherited their layouts. As early as

294-631: A , e , i , o and u to produce á , é , í , ó and ú , reducing the number of sorts needed from 5 to 1. The typebars of "normal" characters struck a rod as they moved the metal character desired toward the ribbon and platen, and each rod depression moved the platen forward the width of one character. Dead keys had a typebar shaped so as not to strike the rod. In English-speaking countries, ordinary typewriters printing fixed-width characters were standardized to print six horizontal lines per vertical inch, and had either of two variants of character width, one called pica for ten characters per horizontal inch and

392-657: A board with fewer keys. Court reporters' stenotype machines use chorded keyboards to enable them to enter text much faster by typing a syllable with each stroke instead of one letter at a time. The fastest typists (as of 2007) use a stenograph, a kind of chorded keyboard used by most court reporters and closed-caption reporters. Some chorded keyboards are also made for use in situations where fewer keys are preferable, such as on devices that can be used with only one hand, and on small mobile devices that don't have room for larger keyboards. Chorded keyboards are less desirable in many cases because it usually takes practice and memorization of

490-448: A certain pattern, allowing only one beam per row of keys (most commonly horizontal beam). Alphabetical, numeric, and punctuation keys are used in the same fashion as a typewriter keyboard to enter their respective symbol into a word processing program, text editor, data spreadsheet, or other program. Many of these keys will produce different symbols when modifier keys or shift keys are pressed. The alphabetic characters become uppercase when

588-558: A chorded keyboard, was invented by Douglas Engelbart . Other types of one-handed keyboards include the FrogPad , the Half-keyboard , and one-handed Dvorak keyboard layouts designed for one hand typing . While other keyboards generally associate one action with each key, chorded keyboards associate actions with combinations of key presses. Since there are many combinations available, chorded keyboards can effectively produce more actions on

686-410: A command line, window form or dialog box to operate its default function, which is typically to finish an "entry" and begin the desired process. In word processing applications, pressing the enter key ends a paragraph and starts a new one. Navigation keys or cursor keys include a variety of keys which move the cursor to different positions on the screen. Arrow keys are programmed to move the cursor in

784-459: A cursor hovering above a menu. On some Samsung keyboards the cursor in the icon is not present, showing the menu only. This key was created at the same time as the Windows key. This key is normally used when the right mouse button is not present on the mouse. Some Windows public terminals do not have a Menu key on their keyboard to prevent users from right-clicking (however, in many Windows applications,

882-504: A cylinder inside a wooden box. In 1874, the cylinder was replaced by a carriage, moving beneath the writing head. Then, in 1875, the well-known "tall model" was patented, which was the first of the writing balls that worked without electricity. Malling-Hansen attended the world exhibitions in Vienna in 1873 and Paris in 1878 and he received the first-prize for his invention at both exhibitions. The first typewriter to be commercially successful

980-421: A firm contract for the next batch. However, Remington was engaged in merger talks, which would eventually result in the creation of Remington Rand and no executives were willing to commit to a firm order. Northeast instead decided to enter the typewriter business for itself, and in 1929 produced the first Electromatic Typewriter. In 1928, Delco , a division of General Motors , purchased Northeast Electric, and

1078-406: A game controller, and can be used as such, instead of laid out flat on top of a table surface. Typically handheld keyboards hold all the alphanumeric keys and symbols that a standard keyboard would have, yet only be accessed by pressing two sets of keys at once; one acting as a function key similar to a 'Shift' key that would allow for capital letters on a standard keyboard. Handheld keyboards allow

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1176-549: A lack of continuous, reliable electricity. The QWERTY keyboard layout , developed for typewriters in the 1870s, remains the de facto standard for English-language computer keyboards . The origins of this layout still need to be clarified. Similar typewriter keyboards, with layouts optimised for other languages and orthographies, emerged soon afterward, and their layouts have also become standard for computer keyboards in their respective markets. Although many modern typewriters have one of several similar designs, their invention

1274-482: A laser, onto a flat surface. The device then uses a camera or infrared sensor to "watch" where the user's fingers move, and will count a key as being pressed when it "sees" the user's finger touch the projected image. Projection keyboards can simulate a full size keyboard from a very small projector. Because the "keys" are simply projected images, they cannot be felt when pressed. Users of projected keyboards often experience increased discomfort in their fingertips because of

1372-519: A manufacturer of sewing machines ) to commercialize the machine as the Sholes and Glidden Type-Writer . This was the origin of the term typewriter . Remington began production of its first typewriter on March 1, 1873, in Ilion, New York . It had a QWERTY keyboard layout, which, because of the machine's success, was slowly adopted by other typewriter manufacturers. As with most other early typewriters, because

1470-594: A numeric keypad, commonly those of laptop computers. These keys are collectively known as a numeric pad, numeric keys, or a numeric keypad, and it can consist of the following types of keys: Arithmetic operators , numbers , arrow keys , Navigation keys , Num Lock and Enter key . Multifunctional keyboards provide additional function beyond the standard keyboard. Many are programmable, configurable computer keyboards and some control multiple PCs, workstations and other information sources, usually in multi-screen work environments. Users have additional key functions as well as

1568-426: A reduced set of keys. They may not have a numeric keypad , and the function keys may be placed in locations that differ from their placement on a standard, full-sized keyboard. The switch mechanism for a laptop keyboard is more likely to be a scissor switch than a rubber dome; this is opposite the trend for full-size keyboards. Flexible keyboards are a junction between normal type and laptop type keyboards: normal from

1666-459: A screenshot in the clipboard . The Break key /Pause key no longer has a well-defined purpose. Its origins go back to teleprinter users, who wanted a key that would temporarily interrupt the communications line. The Break key can be used by software in several different ways, such as to switch between multiple login sessions, to terminate a program, or to interrupt a modem connection. In programming, especially old DOS-style BASIC, Pascal and C, Break

1764-462: A similar functionality can be invoked with the Shift+F10 keyboard shortcut ). Many, but not all, computer keyboards have a numeric keypad to the right of the alphabetic keyboard, often separated from the other groups of keys such as the function keys and system command keys, which contains numbers, basic mathematical symbols (e.g., addition, subtraction, etc.), and a few function keys. In addition to

1862-527: A specified direction; page scroll keys, such as the Page Up and Page Down keys , scroll the page up and down. The Home key is used to return the cursor to the beginning of the line where the cursor is located; the End key puts the cursor at the end of the line. The Tab key advances the cursor to the next tab stop. The Insert key is mainly used to switch between overtype mode, in which the cursor overwrites any text that

1960-425: A variety of function keys . The repertoire of glyphs engraved on the keys of a keyboard accords with national conventions and language needs. Computer keyboards are similar to electric-typewriter keyboards but contain additional keys, such as the command key or Windows keys . Keyboards on laptops and notebook computers usually have a shorter travel distance for the keystroke, shorter over travel distance, and

2058-444: A wired USB connection, or be connected wirelessly and powered by batteries. Illumination facilitates the use of the keyboard or keypad in dark environments. Typewriter A typewriter is a mechanical or electromechanical machine for typing characters. Typically, a typewriter has an array of keys , and each one causes a different single character to be produced on paper by striking an inked ribbon selectively against

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2156-646: A workable design. Some early typing instruments include: By the mid-19th century, the increasing pace of business communication had created a need to mechanize the writing process. Stenographers and telegraphers could take down information at rates up to 130 words per minute, whereas a writer with a pen was limited to a maximum of 30 words per minute (the 1853 speed record). From 1829 to 1870, many printing or typing machines were patented by inventors in Europe and America, but none went into commercial production. In 1865, Rev. Rasmus Malling-Hansen of Denmark invented

2254-536: Is a limited workspace. A thumb keyboard (thumb board) is used in some personal digital assistants such as the Palm Treo and BlackBerry and some Ultra-Mobile PCs such as the OQO . Numeric keyboards contain only numbers, mathematical symbols for addition, subtraction, multiplication, and division, a decimal point, and several function keys. They are often used to facilitate data entry with smaller keyboards that do not have

2352-436: Is also descended from the mechanical typewriter. Its main purpose is to enter the space between words during typing. It is large enough so that a thumb from either hand can use it easily. Depending on the operating system, when the space bar is used with a modifier key such as the control key, it may have functions such as resizing or closing the current window, half-spacing, or backspacing. In computer games and other applications

2450-647: Is considered the first practical power-operated typewriter in 1914. In 1920, after returning from Army service, he produced a successful model and in 1923 turned it over to the Northeast Electric Company of Rochester for development. Northeast was interested in finding new markets for their electric motors and developed Smathers's design so that it could be marketed to typewriter manufacturers, and from 1925 Remington Electric typewriters were produced powered by Northeast's motors. After some 2,500 electric typewriters had been produced, Northeast asked Remington for

2548-408: Is designed with a focus on specific features that suit particular needs. Today, most full-size keyboards use one of three different mechanical layouts, usually referred to as simply ISO ( ISO/IEC 9995 -2), ANSI ( ANSI - INCITS 154-1988), and JIS ( JIS X 6002-1980), referring roughly to the organizations issuing the relevant worldwide, United States, and Japanese standards, respectively. (In fact,

2646-543: Is possible to install multiple keyboard layouts within an operating system and switch between them, either through features implemented within the OS, or through an external application. Microsoft Windows, Linux, and Mac provide support to add keyboard layouts and choose from them. Keyboards and keypads may be illuminated from inside, especially on equipment for mobile use. Both keyboards built into computers and external ones may support backlighting; external backlit keyboards may have

2744-432: Is present on and after its current location, and insert mode, where the cursor inserts a character at its current position, forcing all characters past it one position further. The Delete key discards the character ahead of the cursor's position, moving all following characters one position "back" towards the freed place. On many notebook computer keyboards the key labeled Delete (sometimes Delete and Backspace are printed on

2842-468: Is used (in conjunction with Ctrl) to stop program execution. In addition to this, Linux and variants, as well as many DOS programs, treat this combination the same as Ctrl+C. On modern keyboards, the break key is usually labeled Pause/Break. In most Windows environments, the key combination Windows key+Pause brings up the system properties. The escape key ( esc ) has a variety of meanings according to Operating System, application or both. "Nearly all of

2940-555: The Hansen Writing Ball , which went into commercial production in 1870 and was the first commercially sold typewriter. It was a success in Europe and was reported as being used in offices on the European continent as late as 1909. Malling-Hansen used a solenoid escapement to return the carriage on some of his models, which makes him a candidate for the title of inventor of the first "electric" typewriter. The Hansen Writing Ball

3038-647: The Sord M5 Creative Computer , which included a carrying case for the computer. The specifications of the computer are very similar to the MSX , a computer that likely forced the Sord M5 (along with many similar Japanese computers) out of the market by the mid-1980s. The CGL M5 was released in the UK with an introductory price of £195, higher than many of the system's competitors including the ZX Spectrum, and VIC-20 . Whereas

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3136-426: The escape key ) can prompt the computer to execute system commands. In a modern computer, the interpretation of key presses is generally left to the software: the information sent to the computer, the scan code , tells it only which physical key (or keys) was pressed or released. In normal usage, the keyboard is used as a text entry interface for typing text, numbers, and symbols into application software such as

3234-519: The font . In 1941, IBM announced the Electromatic Model 04 electric typewriter, featuring the revolutionary concept of proportional spacing. By assigning varied rather than uniform spacing to different sized characters, the Type 4 recreated the appearance of a typeset page, an effect that was further enhanced by including the 1937 innovation of carbon-film ribbons that produced clearer, sharper words on

3332-421: The "start" button was to hold down the control key and press escape. This process still works in Windows 95, 98, Me, NT 4, 2000, XP, Vista, 7, 8, and 10. The 'enter key' ⌅ Enter and 'return key' ↵ Return are two closely related keys with overlapping and distinct functions dependent on operating system and application . On full-size keyboards, there are two such keys, one in the alphanumeric keys and

3430-535: The 105 key layout is the norm in the rest of the world. This number is not always followed, and individual keys or whole sections are commonly skipped for the sake of compactness or user preference. The most common choice is to not include the numpad, which can usually be fully replaced by the alphanumeric section; such designs are referred to as "tenkeyless" (or TKL). Laptops and wireless peripherals often lack duplicate keys and ones seldom used. Function- and arrow keys are nearly always present. Another factor determining

3528-596: The 1870s, teleprinter-like devices were used to simultaneously type and transmit stock market text data from the keyboard across telegraph lines to stock ticker machines to be immediately copied and displayed onto ticker tape . The teleprinter, in its more contemporary form, was developed from 1907 to 1910 by American mechanical engineer Charles Krum and his son Howard , with early contributions by electrical engineer Frank Pearne . Earlier models were developed separately by individuals such as Royal Earl House and Frederick G. Creed . Earlier, Herman Hollerith developed

3626-580: The Bar-Let and the Corona No. 3 Typewriter have two separate shift keys, a "CAP" shift (for uppercase) and a "FIG" shift (for numbers and symbols). The Murray code was developed for a teletypewriter with a similar three-row typewriter keyboard. To facilitate typewriter use in business settings, a tab (tabulator) key was added in the late nineteenth century. Before using the key, the operator had to set mechanical "tab stops", pre-designated locations to which

3724-453: The Esc key extensively. Historically it also served as a type of shift key, such that one or more following characters were interpreted differently, hence the term escape sequence , which refers to a series of characters, usually preceded by the escape character . On machines running Microsoft Windows, prior to the implementation of the Windows key on keyboards, the typical practice for invoking

3822-589: The Korean alphabet, Hangul . The system specifications of these computers were identical to the original M5, but they had differently shaped cartridge slots. Cartridges from the Sord M5 or other manufacturers could not be used for these computers directly. LG released some original software including several educational programs and games. Despite its short production run, the M5 was supported by various big Japanese game developers such as Namco and Konami . Other models include

3920-467: The M5 Pro and M5 Jr. There are 42 known games for Sord M5 Keyboard (computing) A computer keyboard is a peripheral input device modeled after the typewriter keyboard which uses an arrangement of buttons or keys to act as mechanical levers or electronic switches . Replacing early punched cards and paper tape technology, interaction via teleprinter -style keyboards have been

4018-615: The M5 contained a cartridge slot in an age where most computers were using compact cassettes or floppy disks , the small amount of built-in RAM led to few games being produced for the system. In South Korea, three electronics companies released different personal computers based on Sord M5. The FC-150 was produced and released by LG , Samsung released the SPC-500, and the TommyCom was manufactured and launched by Koryo Systems. These computers supported

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4116-655: The Macintosh and Apple keyboards, the modifier keys are the Option key and Command key , respectively. On Sun Microsystems and Lisp machine keyboards, the Meta key is used as a modifier and for Windows keyboards, there is a Windows key . Compact keyboard layouts often use a Fn key . " Dead keys " allow placement of a diacritic mark, such as an accent, on the following letter (e.g., the Compose key ). The enter/return key typically causes

4214-536: The Simplex Typewriter Company made index typewriters for 1/40 the price of a Remington typewriter. The index typewriter's niche appeal however soon disappeared as, on the one hand new keyboard typewriters became lighter and more portable, and on the other refurbished second-hand machines began to become available. The last widely available western index machine was the Mignon typewriter produced by AEG which

4312-461: The United States—but before the advent of daisywheel and electronic machines—the typewriter market faced strong competition from less expensive typewriters from Asia, including Brother Industries and Silver Seiko Ltd. of Japan. In most of the early typewriters, the typebars struck upward against the paper, pressed against the bottom of the platen , so the typist could not see the text as it

4410-451: The additional cost and space requirements of other types of hardware keyboards. Microsoft Windows, Mac OS X, and some varieties of Linux include on-screen keyboards that can be controlled with the mouse. In these, the mouse has to be maneuvered onto the on-screen letters given by the software. On the click of a letter, the software writes the respective letter in the respective spot. Projection keyboards project an image of keys, usually with

4508-417: The basket of typebars, in which case the typewriter is described as "basket shift", or the paper-holding carriage, in which case the typewriter is described as "carriage shift". Either mechanism caused a different portion of the typebar to come in contact with the ribbon/platen. The result is that each typebar could type two different characters, cutting the number of keys and typebars in half (and simplifying

4606-429: The carriage would advance when the tab key was pressed. This facilitated the typing of columns of numbers, freeing the operator from the need to manually position the carriage. The first models had one tab stop and one tab key; later ones allowed as many stops as desired, and sometimes had multiple tab keys, each of which moved the carriage a different number of spaces ahead of the decimal point (the tab stop), to facilitate

4704-401: The combinations to become proficient. Virtual keyboards , sometimes called on-screen keyboards (rarely software keyboards), consist of computer programs that display an image of a keyboard on the screen. Another input device such as a mouse or a touchscreen can be used to operate each virtual key to enter text. Virtual keyboards have become very popular in touchscreen enabled cell phones due to

4802-409: The concept that each key was attached to a typebar that had the corresponding letter molded, in reverse, into its striking head. When a key was struck briskly and firmly, the typebar hit a ribbon (usually made of inked fabric ), making a printed mark on the paper wrapped around a cylindrical platen . The platen was mounted on a carriage that moved horizontally to the left, automatically advancing

4900-521: The earliest computers incorporated electric typewriter keyboards: the development of the ENIAC computer incorporated a keypunch device as both the input and paper-based output device, and the BINAC computer made use of an electromechanically controlled typewriter for both data entry onto magnetic tape (instead of paper) and data output. The keyboard remained the primary, most integrated computer peripheral well into

4998-505: The electric typewriter came in 1910, when Charles and Howard Krum filed a patent for the first practical teletypewriter . The Krums' machine, named the Morkrum Printing Telegraph, used a typewheel rather than individual typebars. This machine was used for the first commercial teletypewriter system on Postal Telegraph Company lines between Boston and New York City in 1910. James Fields Smathers of Kansas City invented what

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5096-554: The electric typewriter was laid by the Universal Stock Ticker , invented by Thomas Edison in 1870. This device remotely printed letters and numbers on a stream of paper tape from input generated by a specially designed typewriter at the other end of a telegraph line. Some electric typewriters were patented in the 19th century, but the first machine known to be produced in series is the Cahill of 1900. Another electric typewriter

5194-402: The emitters and sensors are located in the perimeter, mounted on a small PCB . The light is directed from side to side of the keyboard interior and it can only be blocked by the actuated keys. Most optical keyboards require at least 2 beams (most commonly vertical beam and horizontal beam) to determine the actuated key. Some optical keyboards use a special key structure that blocks the light in

5292-429: The equal sign. On Japanese/Korean keyboards , there may be language input keys for changing the language to use. Some keyboards have power management keys (e.g., power key, sleep key and wake key); Internet keys to access a web browser or e-mail ; and/or multimedia keys, such as volume controls; or keys that can be programmed by the user to launch a specified application or a command like minimizing all windows. It

5390-452: The era of personal computing until the introduction of the mouse as a consumer device in 1984. By this time, text-only user interfaces with sparse graphics gave way to comparatively graphics-rich icons on screen . However, keyboards remain central to human-computer interaction to the present though mobile personal computing devices such as smartphones and tablets use a virtual keyboard . Different types of keyboards are available and each

5488-508: The far left was then pressed to the right to return the carriage to its starting position and rotating the platen to advance the paper vertically. A small bell was struck a few characters before the right hand margin was reached to warn the operator to complete the word and then use the carriage-return lever. By about 1910, the "manual" or "mechanical" typewriter had reached a somewhat standardized design. There were minor variations from one manufacturer to another, but most typewriters followed

5586-405: The first keypunch devices, which soon evolved to include keys for text and number entry akin to normal typewriters by the 1930s. The keyboard on the teleprinter played a strong role in point-to-point and point-to-multipoint communication for most of the 20th century, while the keyboard on the keypunch device played a strong role in data entry and storage for just as long. The development of some of

5684-583: The front side of the platen, became standard. One of the first was the Daugherty Visible, introduced in 1893, which also introduced the four-bank keyboard that became standard, although the Underwood which came out two years later was the first major typewriter with these features. A significant innovation was the shift key , introduced with the Remington No. 2 in 1878. This key physically "shifted" either

5782-561: The full arrangement of keys, and laptop from the short key distance. Additionally, the flexibility allows the user to fold/roll the keyboard for better storage and transfer. However, for typing the keyboard must be resting on a hard surface. The vast majority of flexible keyboards in the market are made from silicone; this material makes them water- and dust-proof. This is useful in hospitals, where keyboards are subjected to frequent washing, and other dirty or must-be-clean environments. Handheld ergonomic keyboards are designed to be held like

5880-420: The index type--albeit with a very much larger index and number of type elements. Embossing tape label makers are the most common index typewriters today, and perhaps the most common typewriters of any kind still being manufactured. The platen was mounted on a carriage that moved horizontally to the left, automatically advancing the typing position, after each character was typed. The carriage-return lever at

5978-411: The internal mechanisms considerably). The obvious use for this was to allow letter keys to type both upper and lower case , but normally the number keys were also duplexed, allowing access to special symbols such as percent, % , and ampersand, & . Before the shift key, typewriters had to have a separate key and typebar for upper-case letters; in essence, the typewriter had two keyboards, one above

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6076-472: The key has myriad uses in addition to its normal purpose in typing, such as jumping and adding marks to check boxes. In certain programs for playback of digital video, the space bar is used for pausing and resuming the playback. Modifier keys are special keys that modify the normal action of another key, when the two are pressed in combination. For example, Alt + F4 in Microsoft Windows will close

6174-484: The keyboard. In the early part of the 20th century, a typewriter was marketed under the name Noiseless and advertised as "silent". It was developed by Wellington Parker Kidder and the first model was marketed by the Noiseless Typewriter Company in 1917. Noiseless portables sold well in the 1930s and 1940s, and noiseless standards continued to be manufactured until the 1960s. In a conventional typewriter

6272-471: The lack of "give" when typing. A flat, non-reflective surface is also required for the keys to be projected. Most projection keyboards are made for use with PDAs and smartphones due to their small form factor. Also known as photo-optical keyboard, light responsive keyboard, photo-electric keyboard and optical key actuation detection technology. An optical keyboard technology utilizes LEDs and photo sensors to optically detect actuated keys. Most commonly

6370-469: The latter, the Enter key is in a single row (usually the third from the bottom) while in the former it spans over two rows and has an inverse L shape. The purpose of the ⇧ Shift key is to invoke the first alternative function of the key with which it is pressed concurrently. For alphabetic keys, shift+letter gives the upper case version of that letter. For other keys, the key is engraved with symbols for both

6468-482: The main input method for computers since the 1970s, supplemented by the computer mouse since the 1980s. Keyboard keys (buttons) typically have a set of characters engraved or printed on them, and each press of a key typically corresponds to a single written symbol . However, producing some symbols may require pressing and holding several keys simultaneously or in sequence. While most keys produce characters ( letters , numbers or symbols), other keys (such as

6566-595: The mechanical layouts referred such as "ISO" and "ANSI" comply to the primary recommendations in the named standards, while each of these standards in fact also allows the other way.) ANSI standard alphanumeric keyboards have keys that are on three-quarter inch centers (0.75 inches (19 mm)), and have a key travel of at least 0.15 inches (3.8 mm). Modern keyboard models contain a set number of total keys according to their given standard, described as 101, 104, 105, etc. and sold as "Full-size" keyboards. Modern keyboards matching US conventions typically have 104 keys while

6664-414: The number of whose characters (sorts) was constrained by the physical limits of the machine, the number of keys required was reduced by the use of dead keys . Diacritics such as ´ ( acute accent ) would be assigned to a dead key , which did not move the platen forward, permitting another character to be imprinted at the same location; thus a single dead key such as the acute accent could be combined with

6762-410: The opposite direction. By 1900, notable typewriter manufacturers included E. Remington and Sons , IBM , Godrej , Imperial Typewriter Company , Oliver Typewriter Company , Olivetti , Royal Typewriter Company , Smith Corona , Underwood Typewriter Company , Facit , Adler , and Olympia-Werke . After the market had matured under the market dominance of large companies from Britain, Europe and

6860-425: The other elite , for twelve. This differed from the use of these terms in printing, where pica is a linear unit (approximately 1 ⁄ 6 of an inch) used for any measurement, the most common one being the height of a typeface. Some ribbons were inked in black and red stripes, each being half the width and running the entire length of the ribbon. A lever on most machines allowed switching between colors, which

6958-416: The other one is in the numeric keys. The purpose of the enter key is to confirm what has been typed. The return key is based on the original line feed / carriage return function of typewriters : in many word processors, for example, the return key ends a paragraph; in a spreadsheet, it completes the current cell and move to the next cell. The shape of the Enter key differs between ISO and ANSI keyboards: in

7056-684: The other. With the shift key, manufacturing costs (and therefore purchase price) were greatly reduced, and typist operation was simplified; both factors contributed greatly to mass adoption of the technology. Certain models further reduced the number of keys and typebars by making each key perform three functions – each typebar could type three different characters. These little three-row machines were portable and could be used by journalists. Such three-row machines were popular with WWI journalists because they were lighter and more compact than four-bank typewriters, while they could type just as fast and use just as many symbols. Such three-row machines, such as

7154-562: The paper with a type element . Thereby, the machine produces a legible written document composed of ink and paper. By the end of the 19th century, a person who used such a device was also referred to as a type writer . The first commercial typewriters were introduced in 1874, but did not become common in offices in the United States until after the mid-1880s. The typewriter quickly became an indispensable tool for practically all writing other than personal handwritten correspondence. It

7252-501: The program in an active window . In contrast, pressing just F4 will probably do nothing, unless assigned a specific function in a particular program. By themselves, modifier keys usually do nothing. The most widely used modifier keys include the Control key , Shift key and the Alt key . The AltGr key is used to access additional symbols for keys that have three symbols printed on them. On

7350-475: The ribbon being struck at all. This enabled the keys to hit the paper unobstructed, and was used for cutting stencils for stencil duplicators (aka mimeograph machines). The first typewriter to have the sliding type bars (laid out horizontally like a fan) that enable a typewriter to be "noiseless" was the American made Rapid which appeared briefly on the market in 1890. The Rapid also had the remarkable ability for

7448-469: The row of number keys above the top alphabetic row, most desktop keyboards have a number pad or accounting pad, on the right hand side of the keyboard. While num lock is set, the numbers on these keys duplicate the number row; if not, they have alternative functions as engraved. In addition to numbers, this pad has command symbols concerned with calculations such as addition, subtraction, multiplication and division symbols. The enter key in this keys indicate

7546-420: The same key) serves the same purpose as a Backspace key. The Backspace key deletes the preceding character. Lock keys lock part of a keyboard, depending on the settings selected. The lock keys are scattered around the keyboard. Most styles of keyboards have three LEDs indicating which locks are enabled, in the upper right corner above the numeric pad. The lock keys include Scroll lock , Num lock (which allows

7644-419: The shift key or Caps Lock key is depressed. The numeric characters become symbols or punctuation marks when the shift key is depressed. The alphabetical, numeric, and punctuation keys can also have other functions when they are pressed at the same time as some modifier keys. The Space bar is a horizontal bar in the lowermost row, which is significantly wider than other keys. Like the alphanumeric characters, it

7742-482: The size of a keyboard is the size and spacing of the keys. The reduction is limited by the practical consideration that the keys must be large enough to be easily pressed by fingers. Alternatively, a tool is used for pressing small keys. Desktop computer keyboards include alphabetic characters and numerals (and usually additionally a numeric keypad ), typographical symbols and punctuation marks , one or more currency symbols and other special characters, diacritics and

7840-1091: The standard functions and can typically use a single keyboard and mouse to access multiple sources. Multifunctional keyboards may feature customised keypads, fully programmable function or soft keys for macros/pre-sets, biometric or smart card readers, trackballs , etc. New generation multifunctional keyboards feature a touchscreen display to stream video, control audio visual media and alarms, execute application inputs, configure individual desktop environments, etc. Multifunctional keyboards may also permit users to share access to PCs and other information sources. Multiple interfaces (serial, USB, audio, Ethernet, etc.) are used to integrate external devices. Some multifunctional keyboards are also used to directly and intuitively control video walls. Common environments for multifunctional keyboards are complex, high-performance workplaces for financial traders and control room operators (emergency services, security, air traffic management; industry, utilities management, etc.). Many keyboards have been designed for one-handed operation. The first one,

7938-525: The time", it signals Stop , QUIT , or "let me get out of a dialog" (or pop-up window). It triggers the Stop function in many web browsers. The escape key was part of the standard keyboard of the Teletype Model 33 (introduced in 1964 and used with many early minicomputers). The DEC VT50 , introduced July 1974, also had an Esc key. The TECO text editor (ca 1963) and its descendant Emacs (ca 1985) use

8036-403: The type bar reaches the end of its travel simply by striking the ribbon and paper. The Noiseless, developed by Kidder, has a complex lever mechanism that decelerates the type bar mechanically before pressing it against the ribbon and paper in an attempt to dampen the noise. Although electric typewriters would not achieve widespread popularity until nearly a century later, the basic groundwork for

8134-762: The typebars strike upwards, the typist could not see the characters as they were typed. The index typewriter came into the market in the early 1880s. The index typewriter uses a pointer or stylus to choose a letter from an index. The pointer is mechanically linked so that the letter chosen could then be printed, most often by the activation of a lever. The index typewriter was briefly popular in niche markets. Although they were slower than keyboard type machines, they were mechanically simpler and lighter. They were therefore marketed as being suitable for travellers and, because they could be produced more cheaply than keyboard machines, as budget machines for users who needed to produce small quantities of typed correspondence. For example,

8232-605: The typewriter business was spun off as Electromatic Typewriters, Inc. In 1933, Electromatic was acquired by IBM , which then spent $ 1 million on a redesign of the Electromatic Typewriter, launching the IBM Electric Typewriter Model 01. In 1931, an electric typewriter was introduced by Varityper Corporation. It was called the Varityper , because a narrow cylinder-like wheel could be replaced to change

8330-444: The typing of columns with numbers of different length ($ 1.00, $ 10.00, $ 100.00, etc.) Languages such as French, Spanish, and German required diacritics , special signs attached to or on top of the base letter: for example, a combination of the acute accent ´ plus e produced é ; ~ plus n produced ñ . In metal typesetting , ⟨é⟩ , ⟨ñ⟩ , and others were separate sorts . With mechanical typewriters,

8428-455: The typing position, after each character was typed. The carriage-return lever at the far left was then pressed to the right to return the carriage to its starting position and rotating the platen to advance the paper vertically. A small bell was struck a few characters before the right hand margin was reached to warn the operator to complete the word and then use the carriage-return lever. Typewriters for languages written right-to-left operate in

8526-457: The typist to have entire control of the carriage by manipulation of the keyboard alone. The two keys that achieve this are positioned at the top of the keyboard (seen in the detail image below). They are a "Lift" key that advances the paper, on the platen, to the next line and a "Return" key that causes the carriage to automatically swing back to the right, ready for one to type the new line. So an entire page could be typed without one's hands leaving

8624-419: The unshifted and shifted result. When used in combination with other control keys (such as Ctrl , Alt or AltGr ), the effect is system and application dependent. The Menu key or Application key is a key found on Windows-oriented computer keyboards. It is used to launch a context menu with the keyboard rather than with the usual right mouse button. The key's symbol is usually a small icon depicting

8722-464: The use of the numeric keypad), and Caps lock . The SysRq and Print screen commands often share the same key. SysRq was used in earlier computers as a "panic" button to recover from crashes (and it is still used in this sense to some extent by the Linux kernel ; see Magic SysRq key ). The Print screen command used to capture the entire screen and send it to the printer, but in the present it usually puts

8820-454: The user the ability to move around a room or to lean back on a chair while also being able to type in front or away from the computer. Some variations of handheld ergonomic keyboards also include a trackball mouse that allow mouse movement and typing included in one handheld device. Smaller external keyboards have been introduced for devices without a built-in keyboard, such as PDAs , and smartphones. Small keyboards are also useful where there

8918-443: Was incremental, developed by numerous inventors working independently or in competition with each other over a series of decades. As with the automobile , the telephone, and telegraph , several people contributed insights and inventions that eventually resulted in ever more commercially successful instruments. Historians have estimated that some form of the typewriter was invented 52 times as thinkers and tinkerers tried to come up with

9016-526: Was patented in 1868 by Americans Christopher Latham Sholes , Frank Haven Hall , Carlos Glidden and Samuel W. Soule in Milwaukee, Wisconsin , although Sholes soon disowned the machine and refused to use or even recommend it. The working prototype was made by clock-maker and machinist Matthias Schwalbach. Hall, Glidden and Soule sold their shares in the patent (US 79,265) to Densmore and Sholes, who made an agreement with E. Remington and Sons (then famous as

9114-486: Was produced by the Blickensderfer Manufacturing Company , of Stamford, Connecticut , in 1902. Like the manual Blickensderfer typewriters, it used a cylindrical typewheel rather than individual typebars. The machine was produced in several variants but apparently not a commercial success, having come to market ahead of its time, before ubiquitous electrification . The next step in the development of

9212-465: Was produced until 1934. Considered one of the very best of the index typewriters, part of the Mignon's popularity was that it featured interchangeable indexes as well as type , fonts and character sets . This is something very few keyboard machines were capable of--and only at considerable added cost. Although they were pushed out of the market in most of the world by keyboard machines, successful Japanese and Chinese typewriters typewriters are of

9310-410: Was produced with only upper-case characters. The Writing Ball was a template for inventor Frank Haven Hall to create a derivative that would produce letter prints cheaper and faster. Malling-Hansen developed his typewriter further through the 1870s and 1880s and made many improvements, but the writing head remained the same. On the first model of the writing ball from 1870, the paper was attached to

9408-402: Was typed. What was typed was not visible until a carriage return caused it to scroll into view. The difficulty with any other arrangement was ensuring the typebars fell back into place reliably when the key was released. This was eventually achieved with various ingenious mechanical designs and so-called "visible typewriters" which used frontstriking, in which the typebars struck forward against

9506-404: Was useful for bookkeeping entries where negative amounts were highlighted in red. The red color was also used on some selected characters in running text, for emphasis. When a typewriter had this facility, it could still be fitted with a solid black ribbon; the lever was then used to switch to fresh ribbon when the first stripe ran out of ink. Some typewriters also had a third position which stopped

9604-513: Was widely used by professional writers, in offices, in business correspondence in private homes, and by students preparing written assignments. Typewriters were a standard fixture in most offices up to the 1980s. After that, they began to be largely supplanted by personal computers running word processing software. Nevertheless, typewriters remain common in some parts of the world. For example, typewriters are still used in many Indian cities and towns, especially in roadside and legal offices, due to

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