A keyboard layout is any specific physical, visual, or functional arrangement of the keys, legends, or key-meaning associations (respectively) of a computer keyboard , mobile phone , or other computer-controlled typographic keyboard.
67-697: The Bharatiya Sakshya Adhiniyam, 2023 ( IAST : Bhāratīya Sākśya Adhiniyam ; lit. ' Indian Evidence Act ' ) is an Act of the Parliament of India . The Adhiniyam consists of 170 sections as opposed to the 167 sections in the previous Indian Evidence Act. Of these 167 sections, 23 sections have been modified, five removed, and one more section added. The new law makes it difficult for defendants to defend themselves at court and encourages prosecutors to produce potentially dubious evidence. International Alphabet of Sanskrit Transliteration The International Alphabet of Sanskrit Transliteration ( IAST )
134-568: A macron ). Vocalic (syllabic) consonants, retroflexes and ṣ ( / ʂ ~ ɕ ~ʃ/ ) have an underdot . One letter has an overdot: ṅ ( /ŋ/ ). One has an acute accent : ś ( /ʃ/ ). One letter has a line below: ḻ ( / ɭ / ) (Vedic). Unlike ASCII -only romanisations such as ITRANS or Harvard-Kyoto , the diacritics used for IAST allow capitalisation of proper names. The capital variants of letters never occurring word-initially ( Ṇ Ṅ Ñ Ṝ Ḹ ) are useful only when writing in all-caps and in Pāṇini contexts for which
201-461: A scancode to the operating system (OS) when a key is pressed or released. This code reports only the key's row and column, not the specific character engraved on that key. The OS converts the scancode into a specific binary character code using a "scancode to character" conversion table, called the keyboard mapping table. This means that a physical keyboard may be dynamically mapped to any layout without switching hardware components—merely by changing
268-472: A with acute accent ), Compose followed by A and then E results in æ ( ae ligature ), and Compose followed by O and then C results in © (circled c , copyright symbol ). The Compose key is supported by the X Window System (used by most Unix-like operating systems , including most Linux distributions ). Some keyboards have a key labeled "Compose", but any key can be configured to serve this function. For example,
335-502: A century of scholarly usage in books and journals on classical Indian studies. By contrast, the ISO 15919 standard for transliterating Indic scripts emerged in 2001 from the standards and library worlds. For the most part, ISO 15919 follows the IAST scheme, departing from it only in minor ways (e.g., ṃ/ṁ and ṛ/r̥)—see comparison below. The Indian National Library at Kolkata romanization , intended for
402-400: A dead key by default, or sometimes a normal key can temporarily be altered to function as a dead key by simultaneously holding down the secondary-shift key— AltGr or ⌥ Option : a typical example might be AltGr + 6 a will produce â (assuming the "6" key is also the "^" key). In some systems, there is no indication to the user that a dead key has been struck, so
469-433: A font, etc. It can be enabled in the input menu in the menu bar under System Preferences → International → Input Menu (or System Preferences → Language and Text → Input Sources) or can be viewed under Edit → Emoji & Symbols in many programs. Equivalent tools – such as gucharmap ( GNOME ) or kcharselect ( KDE ) – exist on most Linux desktop environments. Users of SCIM on Linux based platforms can also have
536-465: 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 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
603-405: A letter with a specific diacritic. For example, on some keyboard layouts, the grave accent key ` is a dead key: in this case, striking ` and then A results in à ( a with grave accent); ` followed by ⇧ Shift + E results in È ( E with grave accent). A grave accent in isolated form can be typed by striking ` and then Space bar . A key may function as
670-478: A lighter touch for such characters as the period or comma, which did not occupy as much area on the paper. Since an electric typewriter supplied the force to the typebar itself after the typist merely touched the key, the typewriter itself had to be designed to supply different forces for different characters. To simplify this, the most common layout for electric typewriters in the United States differed from that for
737-424: A manual typewriter. This was imperfect, as some shifted special characters were moved one key to the left, as the number zero, although on the right, was low in code sequence. Later, when computer terminals were designed from less expensive electronic components, it was not necessary to have any bits in common between the shifted and unshifted characters on a given key. This eventually led to standards being adopted for
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#1732858925401804-406: A modifier key is held down while another key is struck. To facilitate this, modifier keys usually come in pairs, one functionally identical key for each hand, so holding a modifier key with one hand leaves the other hand free to strike another key. An alphanumeric key labelled with only a single letter (usually the capital form) can generally be struck to type either a lower case or capital letter,
871-412: A paragraph of text and advance an editing cursor to the start of the next available line, similar to the "carriage return" key of a typewriter. When the attached system is processing a user command line , pressing "enter" may signal that the command has been completely entered and that the system may now process it. Shift key: when one presses shift and a letter, it will capitalize the letter pressed with
938-549: 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 the "start" button was to hold down the control key and press escape. This process still works in Windows 10 and 11. An "enter" key may terminate
1005-506: A very influential electric typewriter, which was imitated by computer keyboards; and the IBM PC (1981), namely the Model M (1985), which is the basis for many modern keyboard layouts. Within a community, keyboard layout is generally quite stable, due to the high training cost of touch-typing , and the resulting network effect of having a standard layout and high switching cost of retraining, and
1072-623: Is a transliteration scheme that allows the lossless romanisation of Indic scripts as employed by Sanskrit and related Indic languages. It is based on a scheme that emerged during the 19th century from suggestions by Charles Trevelyan , William Jones , Monier Monier-Williams and other scholars, and formalised by the Transliteration Committee of the Geneva Oriental Congress , in September 1894. IAST makes it possible for
1139-782: Is by setting up an alternative keyboard layout . This allows one to hold a modifier key to type letters with diacritical marks. For example, alt + a = ā. How this is set up varies by operating system. Linux/Unix and BSD desktop environments allow one to set up custom keyboard layouts and switch them by clicking a flag icon in the menu bar. macOS One can use the pre-installed US International keyboard, or install Toshiya Unebe's Easy Unicode keyboard layout. Microsoft Windows Windows also allows one to change keyboard layouts and set up additional custom keyboard mappings for IAST. This Pali keyboard installer made by Microsoft Keyboard Layout Creator (MSKLC) supports IAST (works on Microsoft Windows up to at least version 10, can use Alt button on
1206-476: Is especially useful when using a terminal, X11 (a Unix environment included with OS X as an install option) or MS Windows . The key can generally be used to produce a secondary mouse click as well. There is also a Fn key on modern Mac keyboards, which is used for switching between use of the F1 , F2 , etc. keys either as function keys or for other functions like media control, accessing Spotlight , controlling
1273-540: Is some variation between different keyboard models in the physical layout—i.e., how many keys there are and how they are positioned on the keyboard. However, differences between national layouts are mostly due to different selections and placements of symbols on the character keys. The core section of a keyboard consists of character keys, which can be used to type letters and other characters. Typically, there are three rows of keys for typing letters and punctuation , an upper row for typing digits and special symbols, and
1340-448: Is the actual positioning of keys on a keyboard. Visual layout is the arrangement of the legends (labels, markings, engravings) that appear on those keys. Functional layout is the arrangement of the key-meaning association or keyboard mapping , determined in software, of all the keys of a keyboard; it is this (rather than the legends) that determines the actual response to a key press. Modern computer keyboards are designed to send
1407-559: Is to trigger the Stop button in many web browsers and operating systems. ESC 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 (c. 1963) and its descendant Emacs ( c. 1985 ) use the Esc key extensively. Historically it also served as
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#17328589254011474-697: The Space bar on the bottom row. The positioning of the character keys is similar to the keyboard of a typewriter . Besides the character keys, a keyboard incorporates special keys that do nothing by themselves but modify the functions of other keys. For example, the ⇧ Shift key can be used to alter the output of character keys, whereas the Ctrl ( control ), Alt ( alternate ) and AltGr ( alternative graphic ) keys trigger special operations when used in concert with other keys. (Apple keyboards have differently labelled but equivalent keys, see below). Typically,
1541-503: The Ctrl , Alt and AltGr keys seen on commodity keyboards, Apple Keyboards have ⌘ Cmd ( command ) and ⌥ Option keys. The ⌥ Option key is used much like the AltGr , and the ⌘ Cmd key like the Ctrl and Alt , to access menu options and shortcuts. Macs have a Ctrl key for compatibility with programs that expect a more traditional keyboard layout. It
1608-515: The Latin script , the center, alphanumeric portion of the modern keyboard is most often based on the QWERTY design by Christopher Sholes . Sholes' layout was long thought to have been laid out in such a way that common two-letter combinations were placed on opposite sides of the keyboard so that his mechanical keyboard would not jam. However, evidence for this claim has often been contested. In 2012, an argument
1675-646: The XO laptop , which does not have a ⇪ Caps Lock . The UNIX keyboard layout also differs in the placement of the Esc key, which is to the left of 1 . Some early keyboards experimented with using large numbers of modifier keys. The most extreme example of such a keyboard, the so-called " space-cadet keyboard " found on MIT LISP machines , had no fewer than seven modifier keys: four control keys, Ctrl , Meta , Hyper , and Super , along with three shift keys, ⇧ Shift , Top , and Front . This allowed
1742-570: The language bar in Microsoft Windows ) that allow the user to easily switch between functional layouts. For example, a user with a Swedish keyboard who wishes to type more easily in German may switch to a functional layout intended for German—without regard to key markings. A touch typist skilled in the use of another language layout can use a keyboard with English-language legends if it is remapped to their familiar layout, because they rarely look at
1809-513: The layout of a keyboard may refer to its physical (arrangement of keys), visual (physical labeling of keys), or functional (software response to a key press or release) layout. Physical layouts only address tangible differences among keyboards. When a key is pressed, the keyboard does not send a message such as the A-key is depressed but rather the left-most main key of the home row is depressed . (Technically, each key has an internal reference number,
1876-451: The "bit-pairing" and "typewriter-pairing" forms of keyboards for computer terminals. The typewriter-pairing standard came under reconsideration, on the basis that typewriters have many different keyboard arrangements. The U.S. keyboard for the IBM PC, although it resembles the typewriter-pairing standard in most respects, differs in one significant respect: the braces are on the same two keys as
1943-565: The 'Start' (applications) menu. Keyboard layouts have evolved over time, usually alongside major technology changes. Particularly influential have been: the Sholes and Glidden typewriter (1874, also known as Remington No. 1), the first commercially successful typewriter, which introduced QWERTY ; its successor, the Remington No. 2 (1878), which introduced the shift key; the IBM Selectric (1961),
2010-556: The No. 1 (1874)—though 1 and 0 were added later—shifted keys date in some cases to the No. 2 (1878), in other cases to the Selectric (1961), and modifier key placement largely dates to the Model M (1985); function key placement typically dates to the Model M, but varies significantly, particularly on laptops. The earliest mechanical keyboards were used in musical instruments to play particular notes. With
2077-447: The OS when connected (though the user is still able to reset this at will). Today, most keyboards use one of three different physical 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,
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2144-451: The OS when connected (though the user is still able to reset this at will). A computer keyboard consists of alphanumeric or character keys for typing, modifier keys for altering the functions of other keys, navigation keys for moving the text cursor on the screen, function keys and system command keys —such as Esc and Break —for special actions, and often a numeric keypad to facilitate calculations. There
2211-572: The above discrepancies between functional and visual layouts. A keyboard overlay is a plastic or paper masks that can be placed over the empty space between the keys, providing the user with the functional use of various keys. Alternatively, a user applies keyboard stickers with an extra imprinted language alphabet and adds another keyboard layout via language support options in the operating system. The visual layout of any keyboard can also be changed by simply replacing its keys or attaching labels to them, such as to change an English-language keyboard from
2278-417: The advent of the printing telegraph , a keyboard was needed to select characters. Some of the earliest printing telegraph machines either used a piano keyboard outright or a layout similar to a piano keyboard. The Hughes-Phelps printing telegraph piano keyboard laid keys A-N in left-to-right order on the black piano keys, and keys O-Z in right-to-left order on the white piano keys below. In countries using
2345-543: The area of Sanskrit studies make use of free OpenType fonts such as FreeSerif or Gentium , both of which have complete support for the full repertoire of conjoined diacritics in the IAST character set. Released under the GNU FreeFont or SIL Open Font License , respectively, such fonts may be freely shared and do not require the person reading or editing a document to purchase proprietary software to make use of its associated fonts. Keyboard layout Physical layout
2412-570: The brackets, as their shifts. This innovation predated the IBM Personal Computer by several years. IBM adopted the 101/102 key layout on the PS/2 in 1987 (after previously using an 84-key keyboard that did not have a separate cursor and numeric keypads). Most modern keyboards basically conform to the layout specifications contained in parts 1, 2, and 5 of the international standard series ISO/IEC 9995 . These specifications were first defined by
2479-860: The compact models have 79, 78, and 80. The visual layout includes the symbols printed on the physical keycaps. Visual layouts vary by language, country, and user preference, and any one physical and functional layout can be employed with a number of different visual layouts. For example, the "ISO" keyboard layout is used throughout Europe, but typical French, German, and UK variants of physically identical keyboards appear different because they bear different legends on their keys. Even blank keyboards—with no legends—are sometimes used to learn typing skills or by user preference. Some users choose to attach custom labels on top of their keycaps. This can be, e.g., for masking foreign layouts, adding additional information such as shortcuts , learning aids, gaming controls, or solely for decorational purposes. The functional layout of
2546-526: The consumer edition since XP. This is limited to characters in the Basic Multilingual Plane (BMP). Characters are searchable by Unicode character name, and the table can be limited to a particular code block. More advanced third-party tools of the same type are also available (a notable freeware example is BabelMap ). macOS provides a "character palette" with much the same functionality, along with searching by related characters, glyph tables in
2613-625: The convention is to typeset the IT sounds as capital letters. For the most part, IAST is a subset of ISO 15919 that merges the retroflex (underdotted) liquids with the vocalic ones ( ringed below ) and the short close-mid vowels with the long ones. The following seven exceptions are from the ISO standard accommodating an extended repertoire of symbols to allow transliteration of Devanāgarī and other Indic scripts , as used for languages other than Sanskrit. The most convenient method of inputting romanized Sanskrit
2680-508: 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, a similar functionality can be invoked with the Shift+F10 keyboard shortcut ). The Windows key opens
2747-457: The desired symbol key). The Menu key or Application key is a key found on Windows-oriented computer keyboards: on Apple keyboard the same function is provided by the Command key (labelled ⌘). 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 a cursor hovering above a menu. On some Samsung keyboards
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2814-497: The key appears dead, but in some text-entry systems the diacritical mark is displayed along with an indication that the system is waiting for another keystroke: either the base character to be marked, an additional diacritical mark, or Space bar to produce the diacritical mark in isolation. Compared with the secondary-shift modifier key, the dead-key approach may be a little more complicated, but it allows more additional letters. Using AltGr, only one or (if used simultaneously with
2881-449: The keyboard refers to the mapping between a physical key (such as the A key) and a consequent software event (such as the letter "A" appearing on the screen). Usually the functional layout is set (in the system configuration ) to match the visual layout of the keyboard being used, so that pressing a key will produce the expected result, corresponding to the legends on the keyboard. However, most operating systems have software (such as
2948-417: The keyboard when typing. Functional layouts can be redefined or customized within the operating system, by reconfiguring the operating system keyboard driver, or with the use of a separate software application, or by transliteration (where letters in another language get mapped to visible Latin letters on the keyboard by the way they sound). Mixed hardware-to-software keyboard extensions exist to overcome
3015-402: The keys to be on three-quarter [ 3 ⁄ 4 , or 0.75] inch centers (about 19 mm, versus musical piano keys which are 23.5 mm or about 0.93 inches wide). 0.75 inches has turned out to be optimum for fast key entry by the average-size hand, and keyboards with this key size are called "full-sized keyboards". On a manual typewriter, the operator could press the key down with
3082-713: The latter requiring the simultaneous holding of the ⇧ Shift key. The ⇧ Shift key is also used to type the upper of two symbols engraved on a given key, the lower being typed without using the modifier key. The Latin alphabet keyboard has a dedicated key for each of the letters A–Z, keys for punctuation and other symbols, usually a row of function keys , often a numeric keypad and some system control keys. In most languages except English, additional letters (some with diacritics ) are required and some are present as standard on each national keyboard, as appropriate for its national language. These keyboards have another modified key, labelled AltGr (alternative graphic), to
3149-458: The modern QWERTY layout. Sholes' chief improvement was thus to lay out the keys in rows offset horizontally from each other by three-eighths, three-sixteenths, and three-eighths inches to provide room for the levers and to reduce hand-movement distance. Although it has been demonstrated that the QWERTY layout is not the most efficient layout for typing, it remains the standard. Sholes chose the size of
3216-545: The normal shift key) two additional letters with each key, whereas using a dead key, a specific diacritic can be attached to a range of different base letters. A Compose key can be characterized as a generic dead key that may in some systems be available instead of or in addition to the more specific dead keys. It allows access to a wide range of predefined extra characters by interpreting a whole sequence of keystrokes following it. For example, striking Compose followed by ' ( apostrophe ) and then A results in á (
3283-429: The one most common on manual typewriters. Single-quote and double-quote, instead of being above the keys for the digits 2 and 8 respectively, were placed together on a key of their own. The underscore, another light character, replaced the asterisk above the hyphen. The ASCII communications code was designed so that characters on a mechanical teletypewriter keyboard could be laid out in a manner somewhat resembling that of
3350-670: The opportunity to install and use the sa-itrans-iast input handler which provides complete support for the ISO 15919 standard for the romanization of Indic languages as part of the m17n library. Or user can use some Unicode characters in Latin-1 Supplement, Latin Extended-A, Latin Extended Additional and Combining Diarcritical Marks block to write IAST. Only certain fonts support all the Latin Unicode characters essential for
3417-578: The otherwise redundant right-hand ⊞ Win key may, when available, be used for this purpose. This can be emulated in Windows with third party programs, for example WinCompose. Depending on the application, some keyboard keys are not used to enter a printable character but instead are interpreted by the system as a formatting, mode shift, or special commands to the system. The following examples are found on personal computer keyboards. The system request ( SysRq ) and print screen ( PrtSc or on some keyboards e.g. PrtScn ) commands often share
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#17328589254013484-535: The physical layouts referred such as "ISO" and "ANSI" comply with the primary recommendations in the named standards, while each of these standards in fact also allows the other.) Keyboard layout in this sense may refer either to this broad categorization or to finer distinctions within these categories. For example, as of May 2008 , Apple Inc . produces ISO, ANSI, and JIS desktop keyboards, each in both extended and compact forms. The extended keyboards have 110, 109, and 112 keys (ISO, ANSI, and JIS, respectively), and
3551-590: The reader to read the Indic text unambiguously, exactly as if it were in the original Indic script. It is this faithfulness to the original scripts that accounts for its continuing popularity amongst scholars. Scholars commonly use IAST in publications that cite textual material in Sanskrit, Pāḷi and other classical Indian languages. IAST is also used for major e-text repositories such as SARIT, Muktabodha, GRETIL, and sanskritdocuments.org. The IAST scheme represents more than
3618-506: The right of the space bar. (US keyboards just have a second Alt key in this position). It can be used to type an extra symbol in addition to the two otherwise available with an alphanumeric key, and using it simultaneously with the ⇧ Shift key usually gives access to a fourth symbol. These third-level and fourth-level symbols may be engraved on the right half of the key top, or they may be unmarked. Cyrillic alphabet and Greek alphabet keyboards have similar arrangements. Instead of
3685-464: The right side of the keyboard instead of Ctrl+Alt combination). Many systems provide a way to select Unicode characters visually. ISO/IEC 14755 refers to this as a screen-selection entry method . Microsoft Windows has provided a Unicode version of the Character Map program (find it by hitting ⊞ Win + R then type charmap then hit ↵ Enter ) since version NT 4.0 – appearing in
3752-483: The romanisation of all Indic scripts , is an extension of IAST. The IAST letters are listed with their Devanagari equivalents and phonetic values in IPA , valid for Sanskrit , Hindi and other modern languages that use Devanagari script, but some phonological changes have occurred: * H is actually glottal , not velar . Some letters are modified with diacritics : Long vowels are marked with an overline (often called
3819-409: The same as Ctrl+C. On modern keyboards, the break key is usually labeled Pause/Break. In most Microsoft Windows environments, the key combination Windows Pause brings up the system properties. The escape key (often abbreviated Esc) "nearly all of the time" signals Stop , QUIT , or let me "get out of a dialog" (or pop-up window). Another common application today of the Esc key
3886-516: 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 is used to capture the entire screen and send it to the printer, but in the present, it usually puts 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
3953-494: The scan code, and these numbers are what is sent to the computer when a key is pressed or released.) The keyboard and the computer each have no information about what is marked on that key, and it could equally well be the letter A or the digit 9 . Historically, the user of the computer was requested to identify the functional layout of the keyboard when installing or customizing the operating system . Modern USB keyboards are plug-and-play ; they communicate their visual layout to
4020-477: The shift key. Another use is to type more symbols than appear to be available, for instance the semi-colon key is accompanied with a colon symbol on the top. To type a semi-colon, the key is pressed without pressing any other key. To type a colon, both this key and the Shift key are pressed concurrently. (Some systems make provision for users with mobility impairment by allowing the Shift key to be pressed first and then
4087-414: The software that interprets the keystrokes. Often, a user can change keyboard mapping in system settings. In addition, software may be available to modify or extend keyboard functionality. Thus the symbol shown on the physical key-top need not be the same as appears on the screen or goes into a document being typed. Modern USB keyboards are plug-and-play ; they communicate their (default) visual layout to
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#17328589254014154-483: The transliteration of Indic scripts according to the IAST and ISO 15919 standards. For example, the Arial , Tahoma and Times New Roman font packages that come with Microsoft Office 2007 and later versions also support precomposed Unicode characters like ī . Many other text fonts commonly used for book production may be lacking in support for one or more characters from this block. Accordingly, many academics working in
4221-523: The ubiquity of the QWERTY layout is a case study in switching costs. Nevertheless, significant market forces can result in changes (as in Turkish adoption of QWERTY), and non-core keys are more prone to change, as they are less frequently used and less subject to the lock-in of touch-typing. The main, alphanumeric portion is typically stable, while symbol keys and shifted key values change somewhat, modifier keys more so, and function keys most of all: QWERTY dates to
4288-716: The user group at AFNOR in 1984 working under the direction of Alain Souloumiac. Based on this work, a well-known ergonomic expert wrote a report which was adopted at the ISO Berlin meeting in 1985 and became the reference for keyboard layouts. The 104/105-key PC keyboard was born when two ⊞ Win keys and a ≣ Menu key were added on the bottom row (originally for the Microsoft Windows operating system). Newer keyboards may incorporate even further additions, such as Internet access (World Wide Web navigation) keys and multimedia (access to media players) buttons. As noted before,
4355-445: The user to type over 8000 possible characters by playing suitable "chords" with many modifier keys pressed simultaneously. A dead key is a special kind of a modifier key that, instead of being held while another key is struck, is pressed and released before the other key. The dead key does not generate a character by itself, but it modifies the character generated by the key struck immediately after, typically making it possible to type
4422-450: The volume, or handling Mission Control . Fn key can be also found on smaller Windows and Linux laptops and tablets, where it serves a similar purpose. Many Unix workstations (and also home computers like the Amiga ) keyboards placed the Ctrl key to the left of the letter A , and the ⇪ Caps Lock key in the bottom left. This position of the Ctrl key is also used on
4489-407: Was advanced by two Japanese historians of technology showing that the key order on the earliest Sholes prototypes in fact followed the left-right and right-left arrangement of the contemporary Hughes-Phelps printing telegraph, described above. Later iterations diverged progressively for various technical reasons, and strong vestiges of the left-right A-N, right-left O-Z arrangement can still be seen in
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