| Subject | English | Lithuanian |
| comp., MS | Exchange Fast Access | Sparčioji "Access" prieiga (A feature that enables Exchange users to see new email messages and up-to-date calendar items as soon as they open Outlook, without waiting for it to finish synchronizing) |
| comp., MS | fail fast exception | sparčiosios trikties išimtis (An exception that cannot be caught by any exception handler and that immediately causes the application to terminate and launch error reporting) |
| comp., MS | fast card | greitoji kortelė (An NFC-enabled card (like a credit card) that users can use for payments or other transactions even when the phone is locked) |
| math. | fast Fourier transform | sparčioji Furjė transformacija |
| comp., MS | Fast Fusion | "Fast Fusion" (One of the music genres that appears under Genre classification in Windows Media Player library. Based on ID3 standard tagging format for MP3 audio files. Winamp genre ID 84) |
| nat.sc., agric. | fast growing | greitai augantis |
| transp., mech.eng. | fast idle | greita tuščioji eiga |
| transp., mech.eng. | fast idle | didelis sūkių skaičius varikliui veikiant tuščiąja eiga |
| comp., MS | fast page mode DRAM | sparčioji puslapinė DRAM (An older form of DRAM, used in personal computers before EDO RAM was introduced, with typical clock timings of 6-3-3-3) |
| comp., MS | fast page-mode RAM | greitosios prieigos puslapinė RAM (A specially designed dynamic RAM that supports access to sequential memory locations with a reduced cycle time) |
| environ. | fast reactor Nuclear reactor which produces more fissile material than it consumes, using fast-moving neutrons and making plutonium-239 from uranium-238, thereby increasing the reactor's efficiency | spartusis reaktorius |
| gen. | fast-spending aid | pagalba ekstremaliosios situacijos atveju |
| gen. | fast-spending aid | pagalba nepaprastosios padėties atveju |
| gen. | fast-spending aid | skubi pagalba |
| environ. | fast-start financing | "skubios pradžios" finansavimas |
| environ. | fast-start funding | "skubios pradžios" finansavimas |
| comp., MS | fast startup | sparčioji paleistis (A method of starting the computer that speeds boot time by ending the user session and hibernating the computer, rather than shutting down all running services) |
| market. | fast-track | paspartintas |
| gen. | fast-track | spartesnis |
| commer., polit., fin. | fast track action | paspartintas veiksmas |
| law | fast-track procedure | skubos tvarka |
| environ. | fast traffic No definition needed | greitasis eismas |
| comp., MS | Fast User Switching | greitasis vartotojo perjungimas (A feature in Windows that allows you to switch to a different computer user account without closing programs and files first) |
| med. | fasting blood glucose | glikemija nevalgius |
| med. | fasting blood sugar | glikemija nevalgius |
| med. | fasting glucose | glikemija nevalgius |
| med. | fasting triglycerides | trigliceridai nevalgius |
