A study of corporate operating system usage by AssetMetrix shows that Windows XP use surged to 38% by Q1 2005, up from 6.6% in Q3 2003. However, the popularity of Windows 2000 has remained high, with 48% of business PCs running it in Q1 2005, down 4% from Q3 2003. Windows 95 and Windows 98 were reduced from a collective 28% to less than 5%. Windows NT popularity was reduced from 13.5% to about 10%. Windows XP became the most popular operating system for companies with fewer than 250 PCs.