Commodore PET User Manual page 88

50 if vou don't specify the file name, vou will have ta give multiple LOAD com-
mands, one for each program up ta the one vou want loaded.
Unlike regular variable names, a file name can have up ta 128 significant charac-
ters. However, the length is effectively limited ta two display lines when typing in
file names from the keyboard. Characters in a file name may be any alphanumeric
or numeric characters. Here are some examples:
TEST PROGRAM 1
TP1
EGGHEAD
XYZ
X1
X2
Vou can abbreviate the file name in the LOAD commando The command:
LOAD "TEST"
would load TEST PROGRAM 1.
LOAD "XY"
wou Id load XYZ. However,
LOAD "X"
wou Id load XYZ, X1, or X2, whichever the PET encou ntered first on the tape.
The abbreviated file name (Iike XY and X above) does not have to be the first
characters in the file name. The PET searches for a file name match on a
character-by-character basis.
This can be a boon if, say, vou have forgotten the exact file names of several pro-
grams, but vou think vou saved them as:
PROG 1
PROG 2
PROG 3
PROG 4
when in fact vou had actually saved them as:
PGM 1
PGM 2
PGM 3
PGM 4
Vou want to load the last program of the bunch, so vou try the command:
LOAD "PROG 4"
The PET will go right past PGM 4 without loading it. since the file names do not
match. Of course, Vou could give successive LOAD commands without specifying
a file name. But vou can also try the command:
LOAD "4"
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