CBSE On-Screen Marking (OSM) is a digital evaluation system designed to make the assessment of CBSE answer sheets more efficient, secure, and transparent. This complete guide explains how CBSE On-Screen Marking (OSM) works, from scanning answer sheets to digital evaluation and result processing. Parents and students can learn about the key features, benefits, marking process, and important considerations of OSM. Understanding this system can help students know how their answer sheets are evaluated and give parents better insight into modern CBSE examination practices and digital assessment.