xP

Xp is an abbreviation used to denote experience points in gaming and related gamified systems. Experience points are numerical counters earned by performing actions such as defeating enemies, completing quests, or achieving milestones. In many role-playing games, accumulating enough XP advances a character to a higher level, granting attributes, abilities, or access to new challenges. In gamification contexts, XP is used as a progress metric to motivate users and to unlock rewards, badges, or leaderboards. The specifics of XP systems—amounts awarded, level curves, and caps—vary widely by game or application.

Windows XP, released by Microsoft in 2001, is a consumer-oriented operating system built on the Windows NT kernel. It introduced a redesigned user interface, better hardware and driver support, improved networking tools, and features like System Restore and Windows Firewall. XP achieved broad market adoption and a long lifespan before being superseded by Windows Vista and later versions. Support ended in 2014, and continued use raises security considerations due to outdated updates and software compatibility issues.

Extreme Programming, abbreviated XP, is a software development methodology developed in the 1990s by Kent Beck and others. It emphasizes adaptability and customer involvement. Core practices include pair programming, test-driven development, frequent small releases, continuous integration, refactoring, simple design, and collective ownership. The goal is to improve software quality and responsiveness to changing requirements. Critics argue that XP can be demanding and ill-suited to large-scale or highly regulated projects without supportive organizational culture.