п»їWHAT CAN BE COMPUTER?
The word " ComputerвЂќ is derived from the word " computeвЂќ which means to determine. In the past, the pc was normally considered to be a calculating system which accustomed to calculate arithmetic operations. But today, computer can be used in every discipline of everyday life to solve complications of different types. Therefore , a computer can be defined as: Description:
Pc is an electronic device that is used to solve different kinds of problems according to a set of guidance given to this. Functions:
A computer is capable of doing following capabilities:
1) Accepts info and guidance as an input.
2) Processes or manipulates the information according to the offered instructions. 3) Produces the output known as details.
4) Retailers information intended for future make use of.
HISTORY OF COMPUTER SYSTEM
A history of personal computers goes back to a very long approach. For many years, persons used their particular brain power to do calculations. Therefore the first personal computers were persons! Electronic pcs were given this name since they performed the work that had recently been designated to people. The brief good some of the older computers is definitely described under: Abacus:
It is original and the easiest form of calculating device, it used fishing rods with beans on them to do calculations. Napier's Bone:
John Napier developed Napier's Bone in 17th century to perform math calculations. Pascaline:
Blaise Pascal created Pascaline in 1642. This consisted of rims and things numbered by 0 to 9 to execute arithmetic calculations. Difference Engine and Deductive Engine:
In 1822, Charles Babbage developed an exclusive calculator known as as вЂDifference Engine' which was powered by steam of calculations. Down the road in 1842, he as well designed вЂAnalytical Engine'. It had been first automated programmable pc which could execute arithmetic measurements at a speed of 60 upgrades per minute. Boolean algebra:
It is called algebra of logic. It was introduced by simply George Boole on 1847 for developing logic brake lines inside the computer. The design of a circuit will be based upon a set of rational statements which return end result on 1s (true) or perhaps 0s (false). Later Mark-1, ENIAC, EDVAC, EDSAC and UNIVAC-1 were designed.
CATEGORY OF COMPUTERS
Computes are becoming manufactured in sizes, data control speeds and so forth Therefore , depending on their memory space size, data processing velocity, amount of data they can carry and selling price, computers will be classified into following four main teams: 1 . Supercomputers.
2 . Mainframe computers.
several. Mini personal computers.
Supercomputers will be the most powerful and fastest personal computers. They were launched in 1960s. They are very expensive. They can perform trillions of calculations in the past. Supercomputers are mainly used for: 1). Whether predicting.
2). Indivisible energy exploration.
3). Airplane design.
5). Online bank, etc .
A few examples of Supercomputers are CDC 6600, CRAY-1, CRAY-2, ETA-10, etc . i). First Supercomputer (CDC 6600):
CDC 6600 was the first Mainframe Supercomputer. It absolutely was introduced in 1965 by Control Data Corporation. Technical Requirements:
1). CDC 6600, serial quantity 3 (pre-production series machine). 2). Transistor machine.
3). Central Processing Product clock routine: 100 a few seconds.
4). Core memory space: 128K phrases of 70 bits (converted to modern terms, with 8-bit bytes, this is zero. 94В MB). 5). Memory access: 1 microsecond (but independent memory banking companies allowed for about one gain access to per clock cycle). 6). Instruction prefetch function.
7). Ten overlapping functional products.
8). 10 autonomous peripheral processor devices (PPU's) every with 4K 12-bit terms of key memory. 9). Huge hard disk drives over one particular meter in diameter kept 500 mil bits every. 10). Tape units (half inch mp3: 7 paths, recording 200, 556 and 800 bytes per inches; one-inch tape: 14 songs recording 800 bytes every inch). 11). High-speed card reader (1200 greeting cards per minute).
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