State Unemployment Insurance as paid in New York, United States

Sui Dynasty of China

SUI is a three letter acronym that can refer to:

Sui (surname), a transcription of two Chinese surnames

Sui language spoken by the Shui

Sui gas field, near Sui, Balochistan, Pakistan

Societate Ukrainian de Interlingua, Interlingua for the Ukrainian Interlingua Society

Sonic user interface or speech user interface, similar to GUI for graphical user interface.

Sui (Balochistan), a city in Balochistan, Pakistan

Sui or Shui people, one of the Kam-Sui peoples, an ethnic group of China and Vietnam

Sui, a Latin word meaning "oneself"; part of the word suicide and the Latin phrases sui generis and sui iuris

Sui (粋), an ideal in Japanese aesthetics similar to iki

The International Olympic Committee country code or the FIFA country code for Switzerland

Speleological Union of Ireland, is the all-Ireland representative body for caving