P1 can refer to many things

• position 1 in a race
• Intel 1st generation IA processor design, or x86
  • 8086
  • 8088
  • 80186, i186, 186
  • 80188, i188, 188
• Intel Pentium, a 5th generation CPU design (586, i586, 80586)
  • Pentium classic
  • PentiumMMX
• Period 1 of the periodic table
• Prinzregenten Str. 1 in Munich, Former American Officer Quarters during Post WWII Era, Address was shortened to "P1" to make it easier to pronounce. Currently "P1" has been converted into one of Munich's most famous and Fashionable Nightclubs.
• Radio stations in the Nordic countries
  • Denmark: DR P1
  • Norway: NRK P1
  • Sweden: SR P1
• One of the predecessors of Honda's ASIMO robot.

See also

• P0
• P2