Digital Equipment 300 Series AXP Reference Manual page 282

diskette
A disk contained in a square jacket. Diskettes can be inserted
and removed from diskette drives.
diskette drive
A disk drive that reads from or writes to a removable diskette,
such as an RX26 diskette.
diskless system
A system that has no storage capacity of its own.
DMA
See direct memory access.
DRAM
See dynamic random-access memory.
drive bracket
A bracket that holds a removable-media drive, such as the RX26,
or a fixed disk drive, such as the RZ25 or RZ26 drives.
dynamic random-access memory
Read/write memory that must be refreshed (read from or written
to) periodically to maintain the storage of information.
environment variable
A global data structure that can be accessed only from console
mode. The setting of these data structures determines how
a system powers up, boots operating system software, and
operates.
error line
A line of information that appears if a self-test or a power-up test
fails. The following information appears on the error line: Field
replaceable unit (FRU) number; component number; component
mnemonic; error message number.
Example:
001 9 NI 172
error message number
A number that appears on the error line representing a
particular system or component problem.
Glossary–10