| Acronym | Definition |
|---|
| XP | Experience (Microsoft Windows XP) |
| XP | Microsoft Windows XP (operating system) |
| XP | Extreme Programming |
| XP | Experience Points |
| XP | Cross-Platform |
| XP | Expansion Pack |
| XP | Extreme Performance (AMD Athlon processor) |
| XP | Extra Performance (AMD Athlon XP+) |
| XP | Extended Stored Procedure (Microsoft SQL Server) |
| XP | Xeon Processor (Windows) |
| XP | Expandable |
| XP | Explosion Proof |
| XP | Experian (credit reporting agency) |
| XP | Xperience |
| XP | Christus (Latin: Christ, epigraphy) |
| XP | Xeroderma Pigmentosum |
| XP | Extended Play |
| XP | Crosspoint (FidoNet Point software) |
| XP | Plans and Programs (USAF) |
| XP | Chi Rho (Christian youth organization) |
| XP | Extended Platform |
| XP | Experimental Prototype |
| XP | Cross Polarization |
| XP | Exophoria |
| XP | Xanthogranulomatous Pyelonephritis |
| XP | Xtreme Prejudice (gaming clan) |
| XP | Ximoko Party (South Africa) |
| XP | Symbol or monogram for Christ or Christianity (from X and P, the first two letters of the Greek word for Christ) |
| XP | Xtreme Paramilitary (gaming clan) |