4M

4M or 4-M may refer to:

• 4m, or 4 metres
• 4-meter band in amateur radio
• 4M, a model of Toyota M engine
• 4M, a model of Mitsubishi 4M4 engine
• 4M, a model of HP LaserJet 4
• DC-4M, a designation of Canadair North Star
• A-4M, a model of Douglas A-4 Skyhawk
• Fokker DH-4M, see Airco DH.4
• VF-4M, see VMA-211
• VB-4M, see VMFA-232
• PB-4M, see Osa (handgun)
• Sun-4m, a model of Sun-4 workstation
• Mayall 4m telescope, see Nicholas U. Mayall was- Telescope
• Meade 4M Community, an astronomy awareness community sponsored by Meade Instruments
• LATAM Argentina, a defunct airline based in Buenos Aires, Argentina
• J-4M, see Barnett J4B
• 4M of manufacture industries are Man, Money, Material and two-Machine. Also see resource management and Ishikawa diagram.
• 4M Software applications for Engineers, see IDEA Architectural and FINE MEP
• 4M, Manfred Memorial Moon Mission, first commercial Moon mission
• 4M, the production code for the 1976 Doctor Who serial The Masque of Mandragora