Association of Lisp Users, a group dedicated to the LISP programming language.

Alcatel-Lucent, a company traded on the NYSE.

Arithmetic logic unit

Alu (demon), the Mesopotamian demon of night.

Alu (volcano), a volcano in Ethiopia

Alu (runic) in Germanic paganism

The Alu sequence, a common short repeated stretch of DNA originally characterized by the action of the Alu restriction endonuclease

Alu, Estonia, a small borough in Rapla Commune, Rapla County, Estonia

Alternate spelling of the Indian word "aloo," meaning potato; appearing in dishes such as saag aloo and aloo gobi