DEC hardware

series of minicomputers having approximately the size of closets; made and marketed by the Digital Equipment Corporation from 1957 to 1990; model numbering from PDP-1 to PDP-16 with some numbers left out

thumb|A DEC Core Memory Unibus card (16K × 18)

computer storage magnetic tape format

thumb|250x250px|A TU56 dual DECtape unit for a DEC PDP-11. Note the 6-armed "starfish" hubs holding circular white tape reels in place. The vertical aluminium block above each pair of tape reels holds the read/write heads.

The Q-bus, also known as the LSI-11 Bus, is one of several bus technologies used with PDP and MicroVAX computer systems previously manufactured by the Digital Equipment Corporation of Maynard, Massachusetts.