000			003930000a22001570004500
245			_aAn Introduction to operating systems
100			_aDeitel, Harvey M.
250			_a2nd ed.
260			_aDelhi _bPearson Education _c1990
300			_axxv, 853p. : ill.
020			_a8177581678
080			_a004.451 _bD4
650			_aCOMPUTER OPERATING SYSTEMS
041			_aEN
942			_cBK _010
999			_c34870 _d34870