SM4, Sm4 or SM-4 may refer to:
Technology and engineering
- SM4 (cipher), a block cipher used in the Chinese National Standard
- SM-4, minicomputer
- VR Class Sm4, a type of train operated by the VR Group
- HST-SM4, the final servicing mission to the Hubble Space Telescope
- Standard Missile 4, a missile
Other uses
- SM4 (classification), a swimming classification
- SM4, a part of the SM postcode area, in Sutton, England
Topics referred to by the same termThis disambiguation page lists articles associated with the same title formed as a letter–number combination.If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: