Chart of the day: 35 years of IBM, Microsoft and Apple by Philip Elmer-DeWitt @FortuneMagazine April 3, 2015, 3:20 PM EDT E-mail Tweet Facebook Google Plus Linkedin Share icons 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.