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Historically, the addition of two Windows keys and a menu key marked the change from the 101/102-key to 104/105-key layout for PC keyboards. [2] Compared to the former layout, a Windows key was placed between the left Ctrl and the left Alt and another Windows key and the menu key were placed between the right Alt (or AltGr) and the right Ctrl key.
The amendment 1 of ISO/IEC 9995-2:2009, which was published in 2012, specifies two ways of the emulation of a numeric keypad within the alphanumeric section of a keyboard. One way, with mappings to keys in the left half of the alphanumeric section (shown green in the diagram above), emulates a numeric keypad with the digits 1,2,3 in the upper row.
Typing on a laptop keyboard. A computer keyboard is a built-in or peripheral input device modeled after the typewriter keyboard [1] [2] which uses an arrangement of buttons or keys to act as mechanical levers or electronic switches.
Keyboard of a German manual typewriter (early 20th century), with Shift keys labelled "Umschalter" ("switch") Keyboard symbol for "Level 2 Select" (i.e. "Shift") The keyboard symbol for the Shift key (which is called Level 2 Select key in the international standard series ISO/IEC 9995) is given in ISO/IEC 9995-7 as symbol 1, and in ISO 7000 “Graphical symbols for use on equipment” as a ...
Romanian letters à and  on the keyboard of an Apple MacBook Pro Romanian SR 13392:2004 ("primary") keyboard layout The original MS Windows' Romanian keyboard. It actually had the cedilla characters and lacked the Euro sign, and in some versions, the dead keys were not implemented, as upon they were typed, they were actually simple diacritic characters.
The UK variant of the Enhanced keyboard commonly used with personal computers designed for Microsoft Windows differs from the US layout as follows: . The UK keyboard has 1 more key than the U.S. keyboard (UK=62, US=61, on the typewriter keys, 102 v 101 including function and other keys, 105 vs 104 on models with Windows keys)
PC (Type 1) [19] 5-pin DIN (DIN 41524) 1 CLK. 2 DATA 3 -RESET 4 GND 5 +5V 2 start bits, 8 data bits, make/break bit (keydown/keyup), 1 stop bit. keyboard reset via pin 3 to ground Not supported XT (Type 2) [20] 1 CLK. 2 DATA 3 N/C 4 GND 5 +5V 2 start bits, 8 data bits, make/break bit (keydown/keyup), 1 stop bit keyboard reset via sequence on ...
A Dell Latitude E4310 laptop with a pointing stick (upper middle) and a touchpad (bottom). They were commonly featured together on Dell Latitude laptops, beginning in the late 1990s. The pointing stick can be used in ultra-compact netbooks [13] where there would be no place for a touchpad.