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College of Nursing Isra N. Alkallak Generations of Computer The First Generation The computer manufactured from 1945-1951. The first computer manufactured in 1946 in USA and called ENIAC (Electronic Numeric Integrator and Calculator). These computers were made from flip flop. The computer used the machine language. In this generation, the computer has big size, low speed, limited of memory capacity and high heat. The Second Generation The computer manufactured from 1952-1960. The computers were made from transistors. The computer used language easier than the machine language. In this generation, the size of computer is less than of first generation, the speed and memory capacity increased from first generation. The Third Generation The computer manufactured from 1961-1969. The computers were made from small scale integrated circuit (SSIC). The integrated circuit is micro chip to put the transistors. In this generation, the computer used special operating system. The size of computer is less than second generation, and increasing of memory. The fourth Generation The computer manufactured in 1970. The computers were made from large scale integrated circuit (LSIC). The speed of computer is higher than the previous generations. In 1980, the persons used the personal computer in universities and offices. The fifth Generation The computer manufactured in 1985. The computers were made from very large scale integrated circuit (VLSIC). The chip has many of transistors. The speed of computer is higher than the previous generations. Increasing of memory. In this generation, the hard disk and floppy disk used to store the information. 1