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Chapter 9
Keyboards, Mice,
and Input Devices
Keyboard Designs
The primary keyboard types are as follows:
• 101-key Enhanced keyboard
• 104-key Windows keyboard
• 83-key PC and XT keyboard (obsolete)
• 84-key AT keyboard (obsolete)
Note
9
If you need information about the 83-key PC and XT keyboard
or 84-key AT keyboard, see Chapter 7 of Upgrading and
Repairing PCs, 10th Anniversary Edition—included in PDF format
on the 12th Edition CD-ROM.
The 101-Key Enhanced Keyboard
This keyboard design serves as the basis for virtually all currentmodel
keyboards.
101-Key Versus 102-Key Keyboards
Foreign language versions of the Enhanced keyboard include 102
keys and a slightly different layout from the 101-key U.S. versions.
The 104-Key Windows Keyboard
The Microsoft Windows keyboard specification outlines a set of
new keys and key combinations. The familiar 101-key layout has
now grown to 104 keys, with the addition of left and right
Windows keys and an Application key. These keys are used for
operating-system and application-level keyboard combinations,
similar to today’s Ctrl and Alt combinations. (Figure 9.2 shows the
standard Windows keyboard layout, including the three new keys.)
Using Windows Keys
Table 9.1 shows a list of all the Windows 9x, Windows NT 4, and
Windows 2000 key combinations that can be performed with the