Definitions. 1  Abatements are reductions in tax assessments and are a normal part of the IRS tax administration process. Abatements may occur for a number of reasons. 2  Accrual Accounting is the accounting basis whereby transactions and events are recognized when they occur, regardless of when cash is received or paid.
(March 2008) In United States aviation, a terminal radar service area (TRSA) is a delimited airspace in which radar and air traffic control services are made available to pilots flying under instrument flight rules or (optionally) visual flight rules for the purposes of maintaining aircraft separation.
(tÉ-lÄmâ²Ä­-trÄ) The automatic measurement and transmission of data from a distant source to a receiving station. Telemetry is used, for example, to track the movements of wild animals that have had radio transmitters attached to them.