00386nam a2200157Ia 4500 20260626122125.0 260626s9999 xx 000 0 und d 978-93259-7563-7 5.43 KHU Khurana, Rohit Operating System 2nd Vikash Publishing House Private Limited Delhi 2022 431 DB 4231 4231 0 0 0 0 CS BSDU BSDU 2025-08-01 Mr. Sunil Saini, BSDU0282 445.00 0 5.43 KHU DB0289 2026-06-26 12:21:25 2026-06-26 DB Computing skills