Birth of Extreme Programming (XP)

Kent Beck became the project lead for the C3 payroll system at Chrysler, where he began formalizing and applying the practices that would become Extreme Programming, with strong contributions from Ward Cunningham and Ron Jeffries.

Significance

XP was one of the earliest and most influential 'lightweight' methodologies, pioneering practices like test-driven development, pair programming, and continuous integration, directly influencing the technical aspects of Agile.