CHAPTER
1
Introducing
the
PET
The Commodore
PET
is
a low-cost personal computer housed in a self-
contained unit.
with
keyboard, video display screen, and built-in or external mag-
netic tape cassette unit. The
PET
is
portable and can sit
on
a desk or tabletop.
Moreover, the
PET
operates on normal household current and uses high quality,
but still inexpensive, magnetic tape cassettes to store information in a computer-
readable form. The
PET
is
powered up simply by plugging
it
in and turning
it
on.
COMMUNICATING
WITH
THE PET
Whenever
you
power
up the PET,
Vou
activate
its
BASIC·
"in-
terpreter."
The
BASIC interpreter
is
a computer program that
is
permanently
built into
every
PET. The
PET
BASIC interpreter carries
out
orders vou give it by
typing
in
commands at the
PET
keyboard. It allows vou to start programming your
PET
as
soon
as
vou turn the power
on.
You can command the
PET
to load a program from a tape cassette, list the
program, execute the program, and perform a number of related chores. You can
also type in your
own
programs at the
PET
keyboard, edit them, run them, and
store them
on
tape cassettes.
"BASIC
is
a registered trademark of the Trustees of Dartmouth College.