P90 or P-90 may refer to:
P-90, an electric guitar pickup produced by Gibson since 1946
FN P90, a submachine gun designed and manufactured by FN Herstal
Nikon Coolpix P90, a digital camera
Ruger P90, a semi-automatic pistol designed and manufactured by Sturm, Ruger & Co.
A field telephone of the Finnish Army
90th percentile
a 90MHz Pentium computer
P90X, a home exercise program
HMAS Attack (P 90), the lead ship of the Attack-class patrol boats used by the Royal Australian Navy

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