INDEX A A/D converters, 4-20 ABT, 4-30 Access direct memory, 7-16 time, 6-2 Accumulator (register), 5-6 Acknowledge external  function,  7-33 input  data,  7-33 output  data,  7-33 signal,  7-32 Adder and subtracter circuits, 4-12 Address bus,  5-24 pointers, buffer, 7-14 translation memory, 6-6 Addressing operands direct,  8-10 extended,  8-11 immediate,  8-11 implicit,  8-11 indexed,  8-11 indirect,  8-12 instruction, 8-10 relative, 8-12 task state instruction, 5-10 ADP security, 1-14 Alarms, audible, 3-2 ALU timing, 5-19 Amplifiers dc,  4-19 sense, 4-21, 6-13, 6-20 Analog signal conversion circuits, 4-19 to digital converters, 4-20, 13-3 Analog switchboards, 13-35 ANSI X3.131, 7-23 Applications programs, 8-3 Architecture cable,  2-23 connector,   2-15 memory, 6-4 Arithmetic logic  unit,  5-18 operations,   5-20 Arrays, 6-16 Assembly/chassis layout, 2-4 ASW systems, 1-8 Asynchronous data exchanges, 7-28 Automatic bus transfers, 4-30 B Backplane/motherboard   layout,   2-6 Backup  power,  4-29 BAP,  7-13 Basic  input/output  system,  5-18 Battery-protected storage, 8-17 Battle  short  mode  operation,  1-13 BCW,  7-13 Binary angular measurement (BAM), 13-4 Binary-coded  decimal,  13-4 BIOS,  5-18 Bipolar ICs, 4-7 Bit,  4-24 Boards,  printed  circuit,  2-13 Boolean  algebra,  4-4 Boot/bootstrap   procedure,   5-18 mainframe computer, 8-25 microcomputer, 8-19 minicomputer,   8-22 Breakers, circuit, 3-2 Buffer address  pointers,  7-13 control  words,  7-13 transmit,  7-21 Bus address,  5-24 computer interconnection system, 5-25 control,  5-24 data,  5-24 direct memory interface, 5-26 I/O MEM bus, 5-25 input/output   controller,   5-25 instruction,   5-25 operand,  5-25 time multiplexed, 5-26 Buses, 5-1 INDEX-1