P6

P6, P-6, or P.6 may refer to:
 * P6 (microarchitecture), a sixth-generation Intel x86 microprocessor microarchitecture
 * POWER6, a sixth-generational IBM microprocessor microarchitecture
 * p6 protein, a protein of HIV
 * HAT-P-6, a star in the constellation Andromeda
 * Integrated Truss Structure, trusses on the International Space Station
 * Rover P6 series, a saloon car model produced from 1963 to 1977 in Solihull, West Midlands, England
 * SIG Sauer P225/P6, a variant of the P225 pistol used by West German police forces
 * Pentacon Six, a single-lens reflex (SLR) medium format camera system
 * Period 6, a period of the periodic table of elements
 * Primavera P6, a project management software package by Primavera (software)
 * IATA code for Privilege Style, a charter airline
 * Principle 6 campaign, opposing anti-gay Russian laws at the 2014 Olympics
 * P6 ATAV, an Indonesian light attack vehicle
 * P-6, a variant of the Cold War era Soviet naval cruise missile SS-N-3A Shaddock
 * PPPPPP (manga), a short hand for the manga by Maporo 3-Gō.
 * Netpbm File_formats, binary ppm file
 * Joint Primary 6 Examination, a standardized examination from 1949 to 1962

Aircraft

 * Curtiss P-6 Hawk, a 1927 American single-engine biplane fighter
 * Piaggio P.6, a 1927 Italian catapult-launched reconnaissance floatplane
 * PZL P.6, a 1930 Polish fighter