Computer

Computer is a tool used to process the data according to procedures that have been formulated. Computer word originally used to describe people who job perform arithmetical calculations, with or without hearing aids, but the meaning of the word is then transferred to the machine itself. Origins, information processing is almost exclusively related to arithmetical problems, but modern computers used for many tasks unrelated to mathematics.

Computer consists of 2 major parts:
1.software (software)
2.hardware (hardware)

1.Hardware
Processor or CPU as the data processing unit
RAM memory, to store data temporarily
Hard drives, semi-permanent storage medium
Input device, the media used to enter data to be processed by the CPU, such as mice, keyboards, and tablets
Output device, the media used to display the output of CPU processing, such as monitors and printers

2.Software
Operating Systems
Basic program on a computer that connects users with computer hardware. Commonly used operating systems are Linux, Windows, and Mac OS. Duties include operating systems (but not only) controls the execution of programs on it, coordination of input, output, processing, memory, and software installation.
The computer program
An additional application installed in accordance with the operating system
[Edit] Slot on the computer
ISA / PCI slot for additional input of non-graphics card
AGP / PCIe, an input slot for additional graphics card
IDE / SCSI / SATA, slots for hard drives / ODD
USB, media input slots for plug-and-play (plug and play, meaning the devices can be connected directly to your computer and can be used)
[Edit] Types of computers
Analog computer
Computer Pulse
Microcomputers
Home computer (home computer)
Personal computer (PC)
Servers
Mainframe computer
Supercomputer