On this day, 36 years ago (1984) IBM introduced the IBM Portable Personal Computer, an early portable computer. It featured a 4.77MHz Intel 8088 processor, 256KB RAM, a 9 inch amber monitor, a 5.25″ floppy drive, and the DOS 2.1 operating system. It weighed 30 pounds (13,6kg) and cost $2,795. Try setting that on your lap.