Academic Background System - it's basically a bunch of questionnaires and placement tests for certain subjects you have to complete before I-day. The questionnaires are for chemistry, English, physics, history, and language (I believe) and the placement tests are for mathLooking on the acronym list on this site, I couldn't find ABS. What's the ABS skills assessment? (thanks!)
If you do poorly on the math exam, would USNA reconsider your offer?