Tech Expert said..
Top 3 IT companies are:
Microsoft
Microsoft Corporation is an American multinational computer technology corporation. It develops, manufactures, licenses, and supports a wide range of software products for computing devices. Microsoft's best-selling products are the Microsoft Windows operating system and the Microsoft Office suite of productivity software.
It deals in Computer software, Publishing, Research and development, Computer hardware, Video games industry
Site: www.microsoft.com
Google
Google Inc. is an American public corporation, earning revenue from online and mobile advertising related to its Internet search, web-based e-mail, online mapping, office productivity, social networking, and video sharing as well as selling advertising-free versions of the same technologies. Google's headquarters, the Googleplex, is located in Mountain View, California, and the company has 19,156 full-time employees (as of March 31, 2008). Its main product is search engine.
See more at: Google Labs
Apple
Apple Inc. formerly Apple Computer, Inc., is an American multinational corporation with a focus on designing and manufacturing consumer electronics and closely related software products. Established in Cupertino, California on April 1, 1976, Apple develops, sells, and supports a series of personal computers, portable media players, mobile phones, computer software, and computer hardware and hardware accessories. As of September 2007, the company operates about 200 retail stores in five countries and an online store where hardware and software products are sold. The iTunes Store provides music, music videos, television programs, movies, podcasts, iPod games, and audiobooks, which can be downloaded using iTunes on Mac or Windows, and also on the iPod touch and the iPhone. The company's best-known hardware products include the Macintosh line of personal computers, the iPod line of portable media players, and the iPhone. Apple's software products include the Mac OS X operating system, the iLife suite of multimedia and creativity software, and Final Cut Studio, a suite of professional audio- and film-industry software products.
Site: www.apple.com