Twiggy Mac (1985)

When the Macintosh was introduced by Apple on January 24, 1984, the diminutive all-in-one computer came with a 9-inch screen and a 3.5-inch floppy disk drive. Many of these revolutionary machines survive to this day. But before this Mac came a slightly different design that used the notoriously unreliable Twiggy floppy disk drive. Many of the disk drives didn’t work and manufacturing yields were low. These problems nearly derailed the Lisa, which began shipping to customers in June 1983 even though there were major problems with its twin-Twiggy configuration. Read more at http://www.cultofmac.com/239280/twiggy-mac-lives-quest-to-resurrect-worlds-oldest-macintosh