F90

F90 or F-90 may refer to:

Science and technology

 * Alacrite, a cobalt-based alloy also known as F90
 * Beechcraft King Air F90, a twin engine turboprop airplane
 * BMW M5 (F90), a 6th generation of high performance variant of the BMW 5 Series
 * Conventional farad, a unit of measurement, symbol F90
 * Fortran 90, a computer programming language
 * Hyperkinetic disorder (ICD-10 code)
 * Nikon F90, a 35mm SLR camera

Military

 * Lockheed XF-90
 * F90 assault rifle, an assault rifle by Thales Australia, a development of the Steyr AUG assault rifle

Other uses

 * F-90 (comics), a fictional likeness of the Lockheed XF-90