How Apple became the world’s No. 1 computer manufacturer by Philip Elmer-DeWitt @FortuneMagazine August 6, 2012, 11:00 AM EDT E-mail Tweet Facebook Google Plus Linkedin Share icons Source: Asymco Source: Asymco FORTUNE — Late last week Asymco‘s Horace Dediu updated some data he has been monitoring for several years on global sales of personal computers — broadly defined to include tablets like the iPad, the Galaxy Tab and the Kindle Fire. Seen in this post-PC light, traditional computer manufacturers like Hewlett-Packard HPQ , Dell DELL and Lenovo LNVGY fall behind and Apple AAPL takes the lead as the world’s leading computer manufacturer. The bad news for Apple is that growth in Mac sales has slowed to nearly the rate of the rest of the PC industry. Click here for Dediu’s perspective on the decline of computing’s Ancien Régime.