What does ISAT stand for?

Initial Surface Absorption Test

Integrated Science and Technology Program - Military

Integration of Safety Analysis Techniques for Process Control Systems (SAUO)

International Society for/of Analytical Trilogy (SAUO)

International Society of Analytical Trilogy - See also SITA - Sao Paulo, Brazil (EAIO)

Interrupt Storage Area Table - Computer science (OA)

Invite, Show, and Test - Military (SDI)