000 003460000a22001450004500
245 _aFrom baker street to binary
100 _aLedgard, Henry...[et al.]
260 _aNew York
_bMcGraw Hill
_c1983
300 _ax, 277p.
020 _a0070369836
080 _a004(091)
_bL4
650 _aCOMPUTERS-History
041 _aEN
942 _cBK
999 _c118895
_d118895