IBM 5150 Hardware Maintenance Manual page 335

Abbreviations
AC:
alternating current
cps:
characters per second
CRU: customer replaceable unit
FRU:
field replaceable unit
KB:
kilo-byte
MIN:
minimum
MAX
maximum
PM:
preventive maintenance
PIC:
problem isolation chart
Vac: volts alternating current
Vdc: volts direct current
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