The letters at the end of a computer file name after the dot, used to identify the file format; specifically used in Mainland China

Computer memory that extends beyond the standard limit of early operating systems or addressable memory

(computing) a software component that adds new features to an existing application, such as a web browser

To expand, spread, or extend as far as a certain point or level.

eXtensible Markup Language (XML)

An interface or base station that allows a portable computer to connect to a desktop monitor and peripheral devices