00395nam a2200145 a 4500 20260809182403.0 260809s9999 xx 000 0 und d 9781285082332 QA 76.5 .D57 2013 Shelly, Gary B Discovering Computers Shel Edinburch : Course Technology, Cengage Learning. 2013 vi,105p; BK 587366 587366