Boasting a Z80A CPU with 64K RAM, dual floppy disk drives, RS-232C/IEEE 488 interfaces, 5-inch CRT, and weather resistant portable housing, this portable computer paved the way for laptops — introduced as the Osborne 1 in 1981 for $1795. View full-sized advertisement here. (Thanks, Will T)

Boasting a Z80A CPU with 64K RAM, dual floppy disk drives, RS-232C/IEEE 488 interfaces, 5-inch CRT, and weather resistant portable housing, this portable computer paved the way for laptops — introduced as the Osborne 1 in 1981 for $1795. View full-sized advertisement here. (Thanks, Will T)