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Chart of the day: 35 years of IBM, Microsoft and Apple

April 3, 2015, 7:18 PM UTC
Source: The Economist

The accompanying article — Microsoft at Middle Age — is now available to non-subscribers. It leads with a Bill Gates quote:

WHAT are you on? The ‘fuck Windows’ strategy?

Thank you, The Economist. And thanks, Kai Riemer, for Friday’s tweet.

Follow Philip Elmer-DeWitt on Twitter at @philiped. Read his Apple (AAPL) coverage at fortune.com/ped or subscribe via his RSS feed.