NUL

NUL may refer to:
 * National University of Lesotho
 * National Urban League, US civil rights organization
 * Nul (band) or NuL, a South African band
 * Nul, rulers of a Galactic Empire in Brian Aldiss's Bow Down to Nul
 * Nulato Airport (IATA code), airport in Nulato, Alaska

Computers

 * The abbreviation for the null character in many character sets
 * The NUL: device in DOS and related systems