SM or sm may refer to:
Smedley Darlington Butler (July 30, 1881 – June 21, 1940) was a United States Marine Corps major general, the highest rank authorized at that time, and at the time of his death the most decorated Marine in U.S.
Smallpox was an infectious disease caused by either of two virus variants, Variola major and Variola minor.
A smartphone is a mobile phone (also known as cell phones or mobiles) with an advanced mobile operating system that combines features of a personal computer operating system with other features useful for mobile or handheld use.
Smallville is an American television series developed by writer-producers Alfred Gough and Miles Millar, based on the DC Comics character Superman created by Jerry Siegel and Joe Shuster.
Short Message Service (SMS) is a text messaging service component of most telephone, World Wide Web, and mobile telephony systems.
A smart card, chip card, or integrated circuit card (ICC) is any pocket-sized card that has embedded integrated circuits.