Apple Inc. is an American multinational corporation that designs and markets consumer electronics, computer software, and personal computers. The company’s best-known hardware products include the Macintosh line of computers, the iPod, the iPhone and the iPad. Apple software includes the Mac OS X operating system; the iTunes media browser; the iLife suite of multimedia and creativity software; the iWork suite of productivity software; Aperture, a professional photography package; Final Cut Studio, a suite of professional audio and film-industry software products; Logic Studio, a suite of music production tools; the Safari web browser; and iOS, a mobile operating system. As of October 2010, the company operates 317 retail stores in ten countries, and an online store where hardware and software products are sold. As of September 2011, Apple is the largest publicly traded company in the world by market capitalization and the largest technology company in the world by revenue and profit.