Osborne Computer Monitor, Model GM-12, circa 1982

The Osborne Computer Company produced the first mass market portable computer--a suitcase-sized "luggable" system weighing 23.5 pounds. This rare GM-12 monitor functioned as an external 11-inch display for the Osborne 1, more than doubling its standard 5-inch screen. Despite initial success, when Osborne declared bankruptcy in 1983, it became the prototype victim of sudden, devastating, technological crashes in high-tech economies.