IBM 3741 Operator's Manual page 11

YOU AND THIS MACHINE
As an operator you'll use the 3741 Data Station 's display
screen, disk units (for loading diskettes), and keyboard and
switches.
Use a cloth dampened with a mild soap solution to clean
the covers, keyboard, display tube face, display mirror, and
display filter.
CAUTION
Do not use spray cleaners on keys or near keyboard.
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