A computer is a device that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming. Modern computers have the ability to follow generalized sets of operations, called programs. These programs enable computers to perform an extremely wide range of tasks.
Computers are used as control systems for a 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-aided design, and also general purpose devices like personal computers and mobile devices such as smartphones.
Early computers were only conceived as calculating devices. 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 have been increasing dramatically ever since then.
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.
Contents
1Introduction of Computer
2History of the Computer
2.1Pre-20th century
2.2First computing device
2.3Analog computers
2.4Digital computers
2.5Modern computers
2.6Mobile computers
3Types of Computer
3.1Based on uses
3.2Based on sizes
4Hardware
4.1History of computing hardware
4.2Other hardware topics
4.3Input devices
4.4Output devices
4.5Control unit
4.6Central processing unit (CPU)
4.7Arithmetic logic unit (ALU)
4.8Memory
4.9Input/output (I/O)
4.10Multitasking
4.11Multiprocessing
5Software
5.1Languages
5.2Application Software
5.3Programs
6Firmware
7Networking and the Internet
8Unconventional computers
9Unconventional computing
10Future
10.1Computer architecture paradigms
10.2Artificial intelligence Regards From PCM COMPUTER
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BELOW AVERAGE STUDENTS COULD GRASP.
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ABOUT PCM COMPUTER
Pcm Computer is An Institute of Computer Education started in 2012 as a digital technology and communication tools to access, manage,integrate, analyze and avaluate information, new knowledge in our society.
