C99 (disambiguation)

C99 may refer to :

• C99, a past version of the C programming language standard.
• a C compiler for the Texas Instruments TI-99/4A home computer
• Ruy Lopez chess openings ECO code
• HMS Blake (C99), a 1945 British Royal Navy cruiser
• a model of Beechcraft Model 99 aircraft
• Minimum Wage Fixing Machinery (Agriculture) Convention, 1951 ILO code
• a fragment of the amyloid precursor protein created by beta-secretase

C-99 may refer to :

• Convair C-99, a military aircraft