"Computer system" redirects here. For other uses, see Computer (disambiguation) and Computer system (disambiguation).
A computer is a device that can be instructed to carry out an arbitrary set of arithmetic or logical operations automatically. Their ability of computers to follow a sequence of operations, called a program, make computers very flexible and useful. Such computers are used as control systems for a very wide variety of industrial and consumer devices.
This includes simple special purpose devices like
microwave ovens and
remote controls, factory devices such as industrial robots and
computer assisted design, but also in general purpose devices like
personal computers and
mobile devices such as
smartphones. The
Internet is run on computers and it connects millions of other computers.
Since ancient times, simple manual devices like the abacus aided people in doing calculations. Early in the Industrial Revolution, some mechanical devices were built to automate long tedious tasks, such as guiding patterns for looms. More sophisticated electrical machines did specialized analog calculations in the early 20th
century. The first digital electronic calculating machines were developed during World War II. The speed, power, and versatility of computers increased continuously and dramatically since then, to the point that artificial intelligence may become possible in the future.
Conventionally, a modern computer consists of at least one processing element, typically a central processing unit (CPU), and some form of memory. The processing element carries out arithmetic and logical operations, and a sequencing and control unit can change the order of operations in response to 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 (e.g., the 2000s-era touchscreen). Peripheral devices allow information to be retrieved from an external source and they enable the result of operations to be saved and retrieved.
TYPE - EBOOK
PAGES - 189
FORMAT - PDF
LANGUAGE - GUJARATI
SIZE - 8MB
CREATED BY - EDDUCATIONAL POINT - PRASHANT BHATT
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