00258nam a2200097Ia 4500008004000000082001600040100002200056245003600078260003500114300001100149210210b1984   xxu||||| |||| 00| 0 eng d  a001.64 WALU  aWALKER (Roger S).  aUnderstanding computer science.  aTexasbTexas Instrumentsc1984  aiv,274