06-09-2017, 01:00 PM
A computer information system is an information system in which the data are mostly collected, stored and processed in digital format using computerized processes. Also, the information is delivered in digital format through computerized mechanisms.
A computer is a device that can be instructed to carry out arbitrary sequences of arithmetic or logic operations automatically. The ability of computers to follow generalized sets of operations, called programs, allows them to perform a wide range of tasks.
Such computers are used as control systems for a wide variety of industrial and consumer devices. This includes simple, special-purpose devices such as microwave ovens and remote controls, factory devices such as industrial robots and computer-aided design, but also on general-purpose devices such as personal computers and mobile devices such as smartphones. The Internet runs on computers and connects millions of other computers.
Since ancient times, simple hand-held devices such as the abacus have helped people to make calculations. At the beginning of the Industrial Revolution, some mechanical devices were built to automate tedious and long tasks, such as guide patterns for looms. More sophisticated electrical machines made specialized analog calculations at the beginning of the 20th century. The first digital electronic calculators were developed during World War II. The speed, power, and versatility of computers have increased steadily and dramatically ever since.
Conventionally, a modern computer comprises at least one processing element, typically a central processing unit (CPU), and some form of memory. The process element performs arithmetic and logic operations, and a sequencing and control unit can change the order of operations in response to the stored information. Peripheral devices include input devices (keyboards, mice, joystick, etc.), output devices (monitor screens, printers, etc.) and input / output devices that perform both functions (for example, was 2000). Peripheral devices allow you to retrieve information from an external source and save and retrieve the result of operations.
A computer is a device that can be instructed to carry out arbitrary sequences of arithmetic or logic operations automatically. The ability of computers to follow generalized sets of operations, called programs, allows them to perform a wide range of tasks.
Such computers are used as control systems for a wide variety of industrial and consumer devices. This includes simple, special-purpose devices such as microwave ovens and remote controls, factory devices such as industrial robots and computer-aided design, but also on general-purpose devices such as personal computers and mobile devices such as smartphones. The Internet runs on computers and connects millions of other computers.
Since ancient times, simple hand-held devices such as the abacus have helped people to make calculations. At the beginning of the Industrial Revolution, some mechanical devices were built to automate tedious and long tasks, such as guide patterns for looms. More sophisticated electrical machines made specialized analog calculations at the beginning of the 20th century. The first digital electronic calculators were developed during World War II. The speed, power, and versatility of computers have increased steadily and dramatically ever since.
Conventionally, a modern computer comprises at least one processing element, typically a central processing unit (CPU), and some form of memory. The process element performs arithmetic and logic operations, and a sequencing and control unit can change the order of operations in response to the stored information. Peripheral devices include input devices (keyboards, mice, joystick, etc.), output devices (monitor screens, printers, etc.) and input / output devices that perform both functions (for example, was 2000). Peripheral devices allow you to retrieve information from an external source and save and retrieve the result of operations.