IBM 6400

351
N Negative True
N/C Not Connected
NC Not Connected
NIC Network Interface Card (an optional Ethernet interface)
NLQ Near Letter Quality
No. Number
NOVRAM Non-volatile Random-Access Memory
ns nanosecond (10
-9
second)
NVRAM Non-volatile Random-Access Memory
NT Not
OLV On Line Verify
OP Operand
P5 + 5 V dc
(P) Pin connector
P(1), P(2), etc. Parallel data 1, data 2, etc.
PAL Programmable Array Logic
PAP Paper
PAPR Paper
PARM Parameter
PCBA Printed Circuit Board Assembly
PCB Printed Circuit Board
PE Printer Error, Paper Empty
PER Peripheral Device
PF picofarad (10
-12
farad)
PFC Paper Feed Controller
PFM Paper Feed Motor
PHA Phase A
PHB Phase B
PI Paper Instruction
PLAT Platen
PLM Platen Motor
PLO Platen Open (Switch)
PMD Paper Motion Detect (Switch)
PN Pin