In 1930 the first analog computer was built by American named Vannevar Bush. This device was used in World War II to help aim guns.
Many technical developments of electronic digital computers took place in the 1940s and 1950s. Mark I – it is the first digital computer. It was completed in This was The first machine that could figure out long lists of mathematical problems at a very fast rate. Left SegmentRight Segment Input-Output Details
The man responsible for this invention was Professor Howard Aiken.
In 1946 Eckert and Maushly built their digital computer with vacuum tubes. They named their new invention ENIAC.
In 1947 Jon von Neumann developed the idea of keeping instructions for computer inside the computers memory. von Neumanns machine was able to store both data and instructions. He also contributed to the idea of storing data and instructions in a binary code that uses only ones and zeros.