After the end of the first quarter, the user base of the desktop and laptop operating system has changed somewhat, according to data published by Netmarketshare. According to the research firm, Windows 7 continues to dominate the worldwide landscape with 44.73 percent of the installed user base. Noteworthy numbers include Windows 8 climbing to 3.17 percent, and Windows XP holding a commanding second place at 38.73 percent, but falling. Mac OS X 10.8 has climbed to 2.65 percent, mostly at the expense of OS X 10.7 dropping to 1.81 percent.