Computing
- Apache Flex, formerly Adobe Flex, technologies for developing rich internet applications
- Flex, a family of automatic test equipment produced by Teradyne
- Flex lexical analyser, a free software alternative to lex
- Flex machine, multiple systems
- FLEX (operating system), a single-tasking operating system for the Motorola 6800
- FlexOS, a modular real-time multi-user multi-tasking operating system developed by Digital Research
- FLEX (protocol), a communication protocol for pagers
- FLEX (SIL FieldWorks Language Explorer), an open source application for linguists developed by SIL International
Read more about this topic: Flex