Computers
- Ralink Technology, a Wi-Fi chipset manufacturer from Taiwan
- Ray tracing (graphics)
- Ray tracing (physics)
- Register transfer, a description of digital circuits
- Request Tracker, an open-source ticketing system
- Ritualist, a term used in the computer game Guild Wars
- Windows RT, a version of Windows 8 for ARM processor devices such as tablets.
- IBM RT, or RT PC, a RISC processor computer series sold by IBM, discontinued in 1991.
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