000 003230000a22001450004500
245 _aComputers : an introduction
100 _aSpencer, Donald D.
260 _aColumbus
_bMerrill
_c1986
300 _axxii, 348p.
020 _a067520559X
080 _a004
_bS7
650 _aCOMPUTERS
041 _aEN
942 _cBK
999 _c58173
_d58173