M3

M3, M-3 or M03 may refer to:

== Computing and electronics == Apple M3, a central processing unit in the Apple M series Intel m3, a brand of microprocessors M.3 (aka NF1/NGSFF), a specification for internally mounted expansion cards Leica M3, a landmark 35mm rangefinder camera Modula-3 (M3), a programming language M3, a British peak programme meter standard used for measuring the volume of audio broadcasts m3, a macro processor for the AP-3 minicomputer, the predecessor to m4 M3, a surface-mount version of the 1N4003 general-purpose silicon rectifier diode M3 (email client), an unreleased email client for the Vivaldi browser