| Subject | English | Bulgarian |
| construct. | extensible crossbar | телескопична капа |
| comp., MS | Extensible Markup Language | език XML (A markup language for describing and exchanging structured data in a format that is independent of operating systems and applications. XML is a World Wide Web Consortium (W3C) specification and is a subset of Standard Generalized Markup Language (SGML)) |
| comp., MS | extensible rights markup language | език XrML (A proposed standard digital rights management (DRM) markup language which enables users to specify rights and conditions associated with resources, such as digital content or Web services) |
| comp., MS | Extensible Stylesheet Language | език XSL (An XML vocabulary that is used to transform XML data to another form, such as HTML, by means of a style sheet that defines presentation rules) |
| law | extensible term | срок, който може да бъде удължен (алешаBG) |
| beekeep. | log hive with two extensible planks | подвижна дъсчица в примитивния кошер, издълбан от дънер |
| construct. | scaffolds with extensible poles | телескопично скеле |
| comp., MS | Unified Extensible Firmware Interface | Унифициран разширяем интерфейс за фърмуер (A standard programming interface for setting up and booting a computer, based on the Extensible Firmware Interface (EFI) developed by Intel. It provides runtime services, which are used to access the drivers that were loaded in the pre-boot environment. For example, when booting from a network, the operating system can continue to use the same network protocols used to download it in the first place) |