000 00299nam a2200133Ia 4500
008 221030s9999 xx 000 0 und d
041 _aEnglish
082 _a105.23
100 _aDavid Barron
245 0 _aComputer Operating Systems
_cby David Barron
260 _c0
650 _aB
942 _cBK
999 _c12815
_d12815