Meaning of ATS in English
Abstract Test Suite: A set of abstract test cases for testing a particular protocol. An "executable" test suite may be derived from an abstract test suite. Attenuation as it passes through most media. Usually proportional to distance, attenuation is sometimes the factor that limits the distance a signal may be transmitted through a media before it can no longer be received.
ATM Forum English vocabulary. Английский словарь организации Форум ATM. 2012