ATMA, or the AIMS Test for Management Admissions, is a national-level entrance exam for post-graduate management programs like MBA, PGDM, MMS, and MCA. It is a computer-based test that evaluates analytical reasoning, verbal skills, and quantitative skills to assess a candidate's aptitude for higher management studies. The exam is conducted multiple times each year, and its scores are accepted by over 750 management institutes across India.