000 00244 a2200109 4500
999 _c52394
_d52394
020 _a9788131521564
100 _a"MCHOES, ANN MCIVER FLYNN"
_9762
245 0 _aUNDERSTANDING OPERATING SYSTEMS
250 _a6
260 _bCENGAGE
365 _b575