The Z1 originally created by Germany's Konrad Zuse in his parents living room in 1936 to 1938 is considered to be the first electrical binary programmable computer.
The first computer with RAM
March 8, 1955
MIT introduces the Whirlwind machine March 8, 1955 , a revolutionary computer that was the first digital computer with magnetic core RAM and real-time graphics
The first minicomputer
In 1960 Digital Equipment Corporation released its first of many PDP computers the PDP-1
The first personal computer:
In 1975 Ed Roberts coined the term personal computer when he introduced the Altair 8800. Although the first personal computer is considered to be the Kenback-1, which was first introduced for $750 in 1971
The first laptop or portable computer
The IBM 5100 is the first portable computer, which was released on September 1975. The computer weighed 55 pounds and had a five inch CRT display, tape drive, 1.9MHz PALM processor, and 64KB of RAM.
The first Apple computer:
Steve Wozniak designed the first Apple known as the Apple I computer in 1976
true first laptop
The first truly portable computer or laptop is considered to be the Osborne I, which was released on April 1981.
March 1983 Compaq released its first computer and the first 100% IBM compatible computer the "Compaq Portable."
In 1985 Dell introduced its first computer, the "Turbo PC."
The first multimedia computer
In 1992 Tandy Radio Shack becomes one of the first companies to release a computer based on the MPC standard with its introduction of the M2500 XL/2 and M4020 SX computers.