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Introduced in 1981, the IBM personal computer was not the world's first PC, but it helped popularize the machine among home and business users.


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Last updated March 03 2011: 7:06 PM ET
Top 50 winners Which companies have the best reputations? Apple tops the list for the third year in a row. Who else made the top 50 this year? More
Full list: 350 Most AdmiredAdmiration from consumers is great, but the true test of respect is approval from the competition. See how 350 top companies rate in 9 key areas. More
Most admired in your state California is home to the most corporations on this year's list. See the top-rated firms near you (including interactive maps). More

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