| English | Bulgarian |
| Exchange Fast Access | Бърз достъп от Exchange (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) |
| fail fast exception | недоловима системна грешка (An exception that cannot be caught by any exception handler and that immediately causes the application to terminate and launch error reporting) |
| fast card | бърза карта (An NFC-enabled card (like a credit card) that users can use for payments or other transactions even when the phone is locked) |
| Fast Fusion | фаст фюжън (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) |
| fast startup | бързо стартиране (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) |
| Fast User Switching | Бързо превключване на потребители (A feature in Windows that allows you to switch to a different computer user account without closing programs and files first) |
