90 may refer to:90 (number), the natural number following 89 and preceding 91 one of the years 90 BC, AD 90, 1990, 2090, etc. The international calling code for Turkey 90 (album), an album by the electronic music group 808 State 90 (EP), an album by the band South Club Atomic number 90: thorium 90 Antiope, double asteroid in the outer asteroid belt 01789838993