Computer history and it’s generation.

 Computer history and it’s generation. 

Although, mechanics computer have existed through much of recording human history, the first electronic computer were developed in the mid-20th century’s ( 1940- 1945). These were the size of a large room, taking as much power several hundred modern personal computer; PCs. Modem computer are based on microprocessors. Example of microprocessors are:                                                    Micro computer                                             A Micro computer is a computer that  has a microprocessor chip and it’s CPU. They are often called personal computer because they are designed to be used by one person at a time. Microcomputer are of two types.                                                                                                                   A)                     Desktop computer

with a case that usually lie flat or horizontally on the desk or table.                                                              (           B) Tower case that stands vertically ( on the desk or under it). The case of the computer holds the motherboard, drives, power supply, and expansion.

with a case that usually lie flat or horizontally on the desk or table.                                                              (           B) Tower case that stands vertically ( on the desk or under it). The case of the computer holds the motherboard, drives, power supply, and expansion.    Laptop or notebook computer are small and lightweight enough to be carried around by the user. They run on battery power, but can also be plugged into a wall socket. They typically have built in LCD display that folds down to protect the display when the. Computer user is not in use.                                personal digital assistant (PDA) is a pocket PC that also uses battery and wall socket power from PHCN and generation. And it is very Portable                          Generations of computer    As it is with the different information ages ( Stone Age, electronic age ....), the development of computer has passed through various stages, usually divided into five categories: first generation computer to the fifth generation computer.                                                                        1. The first generation: the technology of the first type of computer uses the vacuum tube. A vacuum tube is a glass tube surrounding a vacuum ( an area from which all the glass or air have been removed, when connected to electric, current flow through the vacuum. The idea of this computer came about during the Second World War when the United state defense department needed an easier way to compute the firing of its ballistic missiles. J. Prosper Eckert  and Willian mauchly, both scientists at the university of Pennsylvania, USA designed and produced a computer that can offer solutions to the problem.                             2. Second generation computer (1959): vacuum tube were largely replaced in 1960s by transistor based electronic. Walter Houser Brattain, John Bradeen, and Willian Bradford Shockley invented the transistors.  The transistor function as a switch, like the wall socket, able to stop or allow current flow in and out. Like electric switch, when it is on, current can pass through; when it is off, current stop flowing. The inventions of transistors began a new ear of small computer components. With the transistors, it is possible to build more reliable, smaller, faster, cheaper computers, which require less power consumption.                                3. The third generation computer (1964): though transistors were great deal of improvement over the vacuum tubes, they generated heat that could damage parts of the computer. Hence, uses integrated circuits (I Cs) was made by jack kilby and Robert Noyce. With the IC, it became possible to combine electronic components ( e.g transistors, diodes, and resistors) onto a central processing unit, CPU. Integrated circuits are used in many ways according to the function of the devices that utilize them.