000			00365nam a2200157Ia 4500
008			150723s9999 xx 000 0 und d
020			_a2177
082			_a 005.43 RIT-O
100			_a Ritchie, Colin
245			_a Operating Systems
260			_b BPB Pubilications, New Delhi
260			_c2006
300			_a277
650			_a Operating system
942			_cBK
999			_c2051 _d2051