While Google accounts for nearly 50% of the market share of all searches on the internet, it has a few main competitors.  Yahoo is the biggest competitor by far, at around 28.5% but Microsoft isn’t too far behind with 10%, while other competitors include Ask.com and AOL, which both hold around 5% market share.  Because of the variety of Google’s products and services offered, it is hard to target one main competitor.  Yahoo is the most comparable firm because they provide a variety of similar services, such as search, advertising, e-mail, maps, and the Yahoo toolbar, but they do not compete in many of Google’s other respects.  Microsoft on the other hand offers search, a few online services, but their focus has mainly been on software and operating systems.  Google has recently grown into competition with Microsoft through Google Docs & Spreadsheets, along with development of presentation software and a product which may eventually compete with Microsoft Windows, Google Gears.  Furthermore, through internal development and acquisitions, Google will most likely expand the products and services it offers to compete in completely different markets, not just software, and web-based services.