PWI may refer to:

• Pro Wrestling Illustrated
• Public Windows Interface, a Sun initiative to create an open Windows API
• Process Window Index
• Perfect World International a free-to-play MMORPG
• Pune Warriors India, an Indian Premier League team

• 38 Minutes (Stargate Atlantis)
• 38 Parrots
• .38 Police Special
• 38 special
• 38 Special
• .38 Special (band)
• 38 st gang
• 38 Studios
• 38t
• 38th (1st Staffordshire) Regiment of Foot
• 38th Academy Awards
• 38th Air Division
• 38th Army (People's Volunteer Army)
• 38th Battalion (Ottawa), CEF
• 38th Canadian General Election
• 38th Canadian general election
• 38th Canadian House of Commons seating plan
• 38th Canadian parliament
• 38th Chess Olympiad
• 38th Combat Support Wing
• 38th Congress
• 38th Directors Guild of America Awards
• 38th Division (German Empire)
• 38th Foot
• 38th General Assembly of Nova Scotia