https://arstechnica.com/gadgets/2018/08/the-imac-is-20-years-old-this-week/

Apple released the first iMac on August 15, 1998—that makes this week the 20th anniversary of the often divisive, always popular, and ever iconic all-in-one. That first iMac was a revolution in terms of design—an important part of the history of not just Macs but personal computing generally. But some of the choices Apple made haven't aged that well and were controversial even at the time.

It all began with the iMac G3, which was the first product created under the watchful eye of a returning Steve Jobs. Jobs resigned from Apple in the wake of a reorganization by then-CEO John Sculley in the '80s, but he returned to the company in the late '90s and oversaw the iMac and other subsequent successes like the iPod and iPhone. Jobs unveiled the iMac in 1998. His presentation is included below; the iMac reveal begins 16 minutes into the video.