Software and Computing
- FAST Enterprise Search Platform (ESP), a product of the Fast Search & Transfer division of Microsoft
- FAST protocol, an adaptation of the FIX protocol, optimized for streaming
- Feedback Arc Set in Tournaments, a computational problem in graph theory
- Federation Against Software Theft, a UK organization that pursues those who illegally distribute software
- USENIX Conference on File and Storage Technologies
- Facilitated Application Specification Techniques, a team-oriented approach for requirement gathering
- FAST TCP, a TCP congestion avoidance algorithm
- FAST Corner Detection, see Interest point detection (image processing)
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