Computer
A computer is a general-purpose device that could be
programmed to carry out a set of arithmetic as well as logical operations
automatically. Since a sequence of operations might be readily changed, the
computer can solve more than one form of problem.
Conventionally, a computer consists of at least one control element, typically a central processing unit (CPU), and some sort of memory . The processing element carries out arithmetic and judgement operations, and a sequencing and control unit can change the order of operations in reply to stored information . Peripheral devices allow information to always be retrieved from an external source, and the result of surgical procedures saved and retrieved.
Mechanical analog computers started appearing inside first century and were later used in the medieval years for astronomical calculations. In World War II , mechanical analog computers were used by specialized military applications such as calculating torpedo aiming. During on this occasion the first electronic digital computers were developed. Originally they were the dimensions of a large room, consuming as much power as several hundred modern laptops (PCs). [1]
Modern computers based on integrated circuits are millions to immeasureable times more capable than the early machines, and occupy a fraction in the space. [2] Computers are small enough to fit into cellular phones , and mobile computers can be powered by smaller batteries . Personal computers in their various forms are icons of the Information Age and tend to be considered as "computers". However, the embedded computers found in numerous devices from MP3 players to fighter aircraft and from electronic toys to industrial robots include the most numerous.
Conventionally, a computer consists of at least one control element, typically a central processing unit (CPU), and some sort of memory . The processing element carries out arithmetic and judgement operations, and a sequencing and control unit can change the order of operations in reply to stored information . Peripheral devices allow information to always be retrieved from an external source, and the result of surgical procedures saved and retrieved.
Mechanical analog computers started appearing inside first century and were later used in the medieval years for astronomical calculations. In World War II , mechanical analog computers were used by specialized military applications such as calculating torpedo aiming. During on this occasion the first electronic digital computers were developed. Originally they were the dimensions of a large room, consuming as much power as several hundred modern laptops (PCs). [1]
Modern computers based on integrated circuits are millions to immeasureable times more capable than the early machines, and occupy a fraction in the space. [2] Computers are small enough to fit into cellular phones , and mobile computers can be powered by smaller batteries . Personal computers in their various forms are icons of the Information Age and tend to be considered as "computers". However, the embedded computers found in numerous devices from MP3 players to fighter aircraft and from electronic toys to industrial robots include the most numerous.
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