SMU

Educational institutions

 * St. Martin's University, Lacey, Washington, United States
 * St. Matthew's University, the Cayman Islands
 * St. Michaels University School, Victoria, British Columbia, Canada
 * Saint Monica University, Cameroon
 * Samuel Merritt University, Oakland, California, US
 * Sangmyung University, Seoul and Cheonan, South Korea
 * Sefako Makgatho Health Sciences University, Limpopo, South Africa
 * Shanghai Maritime University, China
 * Sikkim Manipal University, Gangtok, India
 * Singapore Management University, Singapore
 * Southern Medical University, Tonghe, Guangzhou, China
 * Southern Methodist University, Dallas, Texas, US
 * SMU Mustangs, athletic teams
 * Southeastern Massachusetts University, now University of Massachusetts Dartmouth, US
 * Swansea Metropolitan University

Other uses

 * Scandinavian Monetary Union, defunct
 * Somray language
 * Source measure unit, a type of test equipment
 * Special Mission Unit, a type of military unit
 * Suburban Multiple Unit (Queensland Rail)
 * Suriname Men United, a gay men's organization
 * Svenska Missionskyrkans Ungdom Scout
 * System Management Unit, in Apple computers
 * Finnish Seafarers' Union (Suomen Merimies-Unioni)