000
00248nam a2200097Ia 4500
008
170501s9999 xx 000 0 und d
100
_a
"sturat , brain L."
245
_a
"operating system, principal and appli."
250
_a
-
260
_b
cengage learing
_c
2010
300
_a
470
999
_c
24094
_d
24094