000			003340000a22001450004500
245			_aStep by step MS DOS 5.0
100			_aBalfe, Alan
260			_aOxford _bNewtech _c1992
300			_a397p.
020			_a0750604719
080			_a004.451.9 _bB3
650			_aCOMPUTER OPERATING SYSTEMS-DOS
041			_aEN
942			_cBK _01
999			_c61298 _d61298