MIB may refer to any of several concepts: · Management Information Base, a computing information repository used (for example) by Simple Network Management Protocol · Mebibit (Mib), a unit of information used, for example, to quantify computer memory or storage capacity · Mebibyte (MiB), a unit of information used, for example, to quantify computer memory or storage capacity · Men in Black, a group of mysterious agents in conspiracy theory · Men in Black , a short-lived comic series from Malibu Comics focusing on a group of these agents · Men in Black , an action/comedy movie, and its sequel Men in Black II based on the comic series · Man in Black , an alleged "super spy" who made reported assassination attempts on Saddam Hussein and has no sure affiliation with a government · Medical Information Bureau, a credit agency for life insurer