The IBM 5100 was the first laptop/portable computer. It included a tape drive, a five inch CRT display, 1.9MHz PALM processor, and 64KB of RAM. It was 55 pounds, considered self-contained rather than portable.
Steve Wozniak designed the first Apple I computer. Apple I contained a 6502 8-bit processor and 4 KB of memory. The memory could be expanded using expansion cards. The circuit board was fully assembled, but lacking the power supply, display keyboard, and case.
The Osborne I was the first TRULY portable computer. It was developed by Adam Osborne and weighed 24 pounds. It had 64KB of memory and two drives. It also contained a modem.
The first PC Clone was developed by Compaq. It was compatible with IBM software and computers. PC Clones are designed to look just like another successful product, that can run on the same software and uses the same expansion cards.
In 1992, Tandy Radio Shack became the first to release a computer based on the MPC standard. It introduced the M2500 XL/2 and 4020 SX computers. The MPC standard is any computer capable of running video, animation, audio and graphics.
IBM ThinkPad 775CD
The IBM ThinkPad 775CD is the first notebook with an integrated CD-ROM. This laptop was a major step in modern computers. IBM released two models leading up to the ThinkPad. The ThinkPad was the new and improved version of the PC Convertible, and IBM portable.