.ZM1 File Extension

First video recording of a Super Nintendo (SNES) game played using the ZSNES emulator; can be played back within the ZSNES program; the ".zm1" extension is used for the first recording of a game, while subsequent movies may use the .ZM2, .ZM3 extensions, up to ZM9.

Single ZSNES video files may use the .ZMV extension.

Microsoft Access Add-in (.MDA) file renamed by ZoneAlarm Mailsafe, part of the ZoneAlarm Internet Security Suite; renames the file extension so that the Access Add-in, which is an executable file type, cannot be run directly by Windows.