Android and Apple devices dominate in smartphones, with 85 percent of the worldwide market combined, according to IDC. Apple's success with the iPhone has contributed to making it the world's most valuable company.
Companies making Android devices include Samsung Electronics Co., HTC Corp. and Motorola Mobility, which Google now owns. Samsung also makes phones running Bada, which is based on Linux.
Here are IDC's figures for worldwide smartphone unit sales and market share in the second quarter of 2012, by operating system.
— Android (Google Inc.) — 104.8 million units, 68.1 percent share (46.9 percent a year earlier)
— iOS (Apple Inc.'s iPhone) — 26.0 million units, 16.9 percent share (18.8 percent a year earlier)
— BlackBerry (Research in Motion Ltd.) — 7.4 million units, 4.8 percent share (11.5 percent a year earlier)
— Symbian (mostly used by Nokia Corp.) — 6.8 million units, 4.4 percent share (16.9 percent a year earlier)
— Windows (Microsoft Corp.) — 5.4 million units, 3.5 percent share (2.3 percent a year earlier)
— Linux — 3.5 million units, 2.3 percent share (3.0 percent a year earlier)
— Others — 0.1 million units, 0.1 percent share (0.5 percent a year earlier)