1930s - Konrad Zuse created what became known as the first programmable computer, the Z1, in 1936 in his parent's living room in Berlin. He assembled metal plates, pins, and old film, creating a machine that could easily add and subtract., 1940s - John Mauchly created the ENIAC during World War II to help the Army. The machine could calculate thousands of problems each second. It weighed 30 tons and needed a 1,500-square-foot room to house the 40 cabinets, 6,000 switches, and 18,000 vacuum tubes that comprise the machine., 1950s - The JOHNNIAC computer was completed in 1954 and was used by researchers. The massive machine weighed just over two tons with over 5,000 vacuum tubes. This early computer operated for 13 years or 51,349 hours before being dismantled., 1960s - The first personal home computer, the Programma 101 was launched. The 65-pound machine was the size of a typewriter and had 37 keys and a printer built-in, but no screen., 1970s - The Xerox Alto PC was released. It included a keyboard, mouse and screen., 1980s - Apple releases the first Macintosh computer. It included a screen and a disc drive.. The computer weighed in at 22 pounds and cost $2,495, 1990s - Apple releases the colourful iMac computer. The company sold 800,000 computers in the first five months, saving Apple from going out of business., 2000s - Apple releases the first MacBook Air, the lightest and most portable laptop at the time,

The History of Computers

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