000 00302nam a2200121Ia 4500
008 161118s2016 xx 000 0 und d
082 _a001.6425 CEN-M
100 _aCentral Computer Agency
245 0 _aMicrocomputer Operating System
260 _aLondon
_bHMSO
_c1979
300 _a52p.
942 _2ddc
999 _c21885
_d21885