Computer hardware
Hardware is a comprehensive term for all of the physical parts of a computer, as distinguished from the data it contains or operates on, and the software that provides instructions for the hardware to acoomplish tasks. The boundary between hardware and software is slightly blurry - firmware is software that is "built-in" to the hardware, but such firmware is usually the province of computer programmers and computer engineers in any case and not an issue that computer users need to concern themselves with.
A typical computer (Personal Computer, PC) contains in a desktop or tower case the following parts:
- Motherboard which holds the CPU, main memory and other parts, and has slots for expansion cards
- power supply - a case that holds a transformer, voltage control and fan
- storage controllers, of IDE, SCSI or other type, that control hard disk , floppy disk, CD-ROM and other drives; the controllers sit directly on the motherboard (on-board) or on expansion cards
- graphics controller that produces the output for the monitor
- the hard disk, floppy disk and other drives for mass storage
- interface controllers (parallel, serial, USB, Firewire) to connect the computer to external peripheral devices such as printers or scanners
- Computer architecture
- Storage
- Input/Output
- Braille Embosser
- CD-ROM
- Keyboard
- Monitor
- Computer terminal
- Mouse
- Computer Speech Recognition
- Computer Speech Synthesis
- DVD-ROM
- Digitizing Tablet
- Graphics card
- Joystick
- Joypad
- Modem
- Network card
- Plotter
- Printer
- Refreshable Braille Display
- Scanner
- Sound card
- Touch screen
- Trackball
- Webcam
- Pointing devices
- used laptop/notebook and spares [[1]
See also
- legacy system
- Open hardware
- optical computer
- DNA computer
