Anatomy and medicine •
Aerobic vaginitis, vaginal infection associated with overgrowth of aerobic bacteria •
Arteriovenous (disambiguation) •
Atrioventricular (disambiguation) Electronics and computing •
Access violation, a computer software error •
Age verification, system for checking a user's age •
Antivirus software, used to prevent, detect and remove malicious software •
Audio and video connector, a cable between two devices •
Analog video •
AV Linux, a Linux-based operating system
Fluid dynamics •
Annular velocity, speed of the drilling fluid's movement in a column called an annulus in oil wells •
Apparent viscosity, shear stress divided by shear rate
Vehicles •
AV (cyclecar), a British cyclecar manufactured between 1919 and 1924 •
Bavarian A V, an 1853 steam locomotive model • A US Navy hull classification symbol:
Seaplane tender (AV) •
Autonomous vehicles Other uses in science and technology •
A-type main-sequence star, in astronomy, abbreviated A V •
Aperture value mode, setting on photo cameras that allows to choose a specific aperture value == Other uses==