Ecco secondo delle statistiche provenienti da w3schools, i sistemi operativi con maggior percentuale di diffusione al mondo, nei rispettivi anni.

2007 WinXP W2000 Win98 Vista W2003 Linux Mac
December 73.4% 4.7% 1.3% 6.5% 1.9% 3.5% 4.0%
November 72.8% 5.1% 1.0% 6.3% 2.0% 3.3% 3.9%
October 73.9% 4.9% 0.9% 5.6% 1.9% 3.3% 3.9%
September 74.3% 5.4% 0.9% 4.5% 2.0% 3.4% 3.9%
August 74.4% 5.7% 0.9% 4.0% 2.0% 3.4% 3.9%
July 74.6% 6.0% 0.9% 3.6% 2.0% 3.4% 4.0%
June 74.6% 6.2% 0.9% 3.2% 2.0% 3.4% 4.0%
May 75.0% 6.5% 0.9% 2.8% 1.9% 3.4% 3.9%
April 75.8% 6.8% 0.9% 2.6% 1.9% 3.4% 3.9%
March 76.0% 7.2% 0.9% 1.9% 1.9% 3.4% 3.8%
February 76.1% 7.4% 0.9% 1.2% 1.9% 3.5% 3.8%
January 76.1% 7.7% 1.0% 0.6% 1.9% 3.6% 3.8%
2006 WinXP W2000 Win98 WinNT W2003 Linux Mac
December 75.7% 7.9% 1.0% 0.2% 1.9% 3.6% 3.8%
November 74.9% 8.0% 1.0% 0.3% 1.9% 3.5% 3.6%
October 74.6% 8.9% 1.2% 0.3% 2.0% 3.5% 3.6%
September 74.6% 9.2% 1.4% 0.3% 2.0% 3.5% 3.6%
August 74.4% 10.1% 1.4% 0.3% 2.1% 3.5% 3.6%
July 74.3% 10.1% 1.5% 0.3% 2.0% 3.4% 3.6%
June 74.1% 10.6% 1.6% 0.3% 2.0% 3.4% 3.6%
May 74.2% 10.7% 1.6% 0.2% 2.0% 3.4% 3.6%
April 74.0% 11.2% 1.8% 0.3% 1.9% 3.3% 3.6%
March 72.9% 11.9% 2.0% 0.3% 1.8% 3.4% 3.5%
February 73.3% 12.3% 2.1% 0.3% 1.8% 3.4% 3.6%
January 72.3% 13.1% 2.4% 0.3% 1.7% 3.3% 3.5%
2005 WinXP W2000 Win98 WinNT W2003 Linux Mac
November 71.0% 14.6% 2.7% 0.4% 1.7% 3.3% 3.3%
September 69.2% 15.8% 3.2% 0.5% 1.7% 3.3% 3.1%
July 65.3% 17.7% 3.9% 0.6% 1.6% 3.5% 3.0%
May 64.5% 19.4% 3.9% 0.8% 1.4% 3.3% 2.9%
March 63.1% 20.2% 4.7% 0.9% 1.4% 3.2% 3.0%
January 61.3% 21.6% 5.3% 1.0% 1.2% 3.2% 2.8%
2004 WinXP W2000 Win98 WinNT Win95 Linux Mac
November 59.1% 23.7% 5.6% 1.2% 0.1% 3.1% 2.7%
September 55.9% 26.2% 6.4% 1.5% 0.2% 3.1% 2.6%
July 52.5% 28.4% 7.5% 1.9% 0.2% 3.1% 2.4%
May 51.0% 29.6% 8.2% 2.0% 0.3% 2.9% 2.5%
March 48.0% 31.1% 9.4% 2.4% 0.4% 2.6% 2.4%
January 44.1% 33.6% 10.4% 3.0% 0.4% 2.7% 2.4%
2003 WinXP W2000 Win98 WinNT Win95 Linux Mac
November 42.6% 36.3% 10.9% 3.5% 0.4% 2.6% 2.2%
September 38.0% 37.9% 12.1% 4.1% 0.5% 2.4% 2.0%
July 33.9% 40.6% 12.6% 5.3% 0.6% 2.3% 1.9%
May 31.4% 41.0% 13.9% 5.8% 0.7% 2.2% 1.8%
March 29.1% 41.9% 14.8% 6.6% 0.8% 2.2% 1.8%