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.
More galleries
Last updated March 03 2011: 7:06 PM ET
More galleries
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
Admiration 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
California is home to the most corporations on this year's list. See the top-rated firms near you (including interactive maps). More
