Digital Equipment DEC 3000 Series Service Information page 419

Programmable Array Logic (PAL)
A hardware device that can be programmed by a process that
blows individual fuses to create a circuit.
prompt
A symbol or message displayed by a program or an operating
system, asking you to provide input.
puck
A palm-sized device that slides on a tablet's surface. The puck
and tablet together function as a pointing device. See also
pointing device and tablet.
rackmount enclosure
A type of system cabinet for which components are built to fit into
a metal frame.
random access memory (RAM)
Memory that can be both read from and written to and that
can randomly access any one location during normal operations.
The type of memory the system uses to store the instructions of
programs currently being run.
read-only memory (ROM)
Memory that cannot be modified. The system can use (read) the
data contained in ROM but cannot change it.
Reduced Instruction Set Computer (RISC)
A computer with an instruction set that is reduced in complexity,
but not necessarily in the number of instructions. RISC
architectures typically require more instructions than Complex
Instruction Set Computer (CISC) architectures to perform given
operations, because an individual RISC instruction performs less
work than a CISC instruction.
register
A temporary storage location in hardware logic other than main
memory.
remote
Physically distant from a computer, but linked to a computer by
communication lines. Compare with local.
remote console port
The port that connects a remote access device to a system.
removable-media drive
A drive such as the RRD42, TZK10, TZ30, TLZ06, or RX26 from
which the storage medium is removable.
Glossary–19