•
AUX (company), a Chinese electronics manufacturer •
Auxiliary connector or AUX jack, typically used for analog audio signals • Aux/IAA repressors, related to
auxin plant hormones
Computing •
AUX: (for auxiliary), a DOS text device •
AUX (CONFIG.SYS directive), changes assignment for AUX: device in DR-DOS •
A/UX, a Unix operating system by Apple ==Other uses==