Extensible Messaging and Presence Protocol (XMPP) is a communications protocol that was built to provide full support for cross-platform messaging so that one proprietary system’s users could talk to another’s.

Used in embedded systems, desktop, and laptop computers; the x86 line was developed by Intel, the term was typically used to indicate compatibility with the entire line including 80286, 80386 and 80486 models (hence, the “86”). Also used to differentiate between 32-bit hardware and software from their 64-bit counterparts.