IBM V03 Maintenance Information page 27

NVRAM non-volatile random access memory
OVFL Overflow
T&D Test and diagnostic
™ ™
IPDS Intelligent Printer Data Stream
SCS SNA (systems network architecture) character string
FRU Field replaceable unit
ESD Electrostatic discharge
NPS Network printer server
ACGA Attachment card guide assembly
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Chapter 1. Diagnosing problems