Extreme Programming:

Extreme Programming is when you design the test cases first, and then program backwards. This creates an easier to use programming flow.

Ron Jeffries has written:

'Extreme programming installed' -- subject(s): Development, EXtreme programming, Computer software

Extreme programming is usually a competitive, time-limited event where the participants do their best to create a program that will impress the final judges.

Such events are quite common in the games industry.

The purpose of extreme programming methodology is to improve software quality and responsiveness to meet the customer's requirements. As frequent changes require updated programming to make things run smoothly.

XP stands for many things in the area of I.T.

+ XP is a Microsoft operating systrem.

+ XP is a method for writing software called 'eXtreme Programming'.