IBM 5150 Manual To Operations page 50

.,
.2
.3
.4
..
F6
F7
F6
I~
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The "NUM LOCK" means number lock and is a toggle key; press
once and the numeric key pad is activated. Press again and the
numeric pad is cancelled.
Key Description
1 thru
With "NUM LOCK" activated ONE through NINE
9
will be operative.
DEL
"DECIMAL POINT" is used with numeric key pad.
a
INS
"ZERO" is used with numeric key pad.
-
"MINUS" is used with the numeric key pad.
+
"PLUS" is used with the numeric key pad.
Keyboard 3-4