Wrong, it stood for eXPerience.although XP doesn't stand for anything.
Microsoft Press Release - Feb 05 2001 said:REDMOND, Wash., Feb. 5, 2001 — Microsoft Corp. announced product names today for the upcoming new Microsoft® Windows® desktop operating system and Microsoft Office desktop applications suite. Windows (formerly code-named "Whistler" ) will become Windows XP, and Office (formerly code-named "Office 10" ) will become Office XP. The XP name is short for "experience," symbolizing the rich and extended user experiences Windows and Office can offer by embracing Web services that span a broad range of devices.
im hoping they go for outright performance, never tried 7 yet as vista is doing me fine at the moment, but same here dont have a clue whats next after 7, which isnt released yet, talk about future planning