IBM Personal Computer User Manual

The Typewriter Area
Key positions in the typewriter area are much like those
of a standard typewriter. Some additional keys,
however, perform control functions.
([@)
The Caps Lock key, when pressed once, locks the
characters A through Z in the uppercase position. To
shift to lowercase characters while Cap Lock is on,
press the Shift key. Press the Caps Lock key again
to
release the uppercase mode for characters A through Z.
This is the Enter key. Its purpose is defined
by the programming language or application
you are using. Refer
to the appropriate
manual for its specific function.
3-14 Keyboard

IBM Personal Computer Specifications

General

Manufacturer	IBM
Model	IBM Personal Computer 5150
Release Year	1981
Processor	Intel 8088
Clock Speed	4.77 MHz
RAM	16 KB - 256 KB
Graphics	MDA or CGA
Power Supply	63.5 W
Weight	21 lbs (9.5 kg)
Storage	5.25-inch floppy disk drives, optional 10 MB hard drive
Operating System	IBM PC DOS
Ports	Parallel, Serial, Cassette