Acronym for Industry Standard Architecture. A bus design specification that allows components to be added as cards plugged into standard expansion slots in IBM Personal Computers and compatibles. Originally introduced in the IBM PC/XT with an 8-bit data path, ISA was expanded in 1984, when IBM introduced the PC/AT, to permit a 16-bit data path. A 16-bit ISA slot actually consists of two separate 8-bit slots mounted end-to-end so that a single 16-bit card plugs into both slots. An 8-bit expansion card can be inserted and used in a 16-bit slot (it occupies only one of the two slots), but a 16-bit expansion card cannot be used in an 8-bit slot. See also EISA, Micro Channel Architecture.
Industry Standard Architecture (PC-AT Bus) or Instrument Society of America.
Standard za industrijsku arhitekturu, što je vrsta magistrale (priključnica za proširenje) koja se koristila u originalnom IBM AT-u. Ona se još uvek ugrađuje u PC računare, uprkos pokušajima drugih standarda da zauzmu njeno mesto.