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Here are some common individual computer hardware components that you’ll often find inside a modern computer. These parts are almost always found inside the computer case, so you won’t see them unless you open the computer:
- Motherboard
- Central Processing Unit (CPU)
- Random Access Memory (RAM)
- Power Supply Unit (PSU)
- Video card
- Hard Disk Drive (HDD)
- Solid-State Drive (SSD)
- Optical disk drive (e.g., BD/DVD/CD drive)
- Card reader (SD/SDHC, CF, etc.)
Common hardware that you might find connected to the outside of a computer, although many tablets, laptops, and netbooks integrate some of these items into their housings:
- Monitor
- Keyboard
- Mouse
- Uninterruptible Power Supply (UPS)
- Flash drive
- Printer
- Speakers
- External hard drive
- Pen tablet
Less common individual computer hardware devices, either because these pieces are now usually integrated into other devices or because they’ve been replaced with newer technology:
- Sound card
- Network Interface Card (NIC)
- Expansion card (FireWire, USB, etc.)
- Hard drive controller card
- Analog modem
- Scanner
- Projector
- Floppy disk drive
- Joystick
- Webcam
- Microphone
- Tape drive
- Zip drive
The following hardware is referred to as network hardware, and various pieces are often part of a home or business network:
- Digital modem (e.g., cable modem, DSL modem, etc.)
- Router
- Network switch
- Access point
- Repeater
- Bridge
- Print server
- Firewall
Network hardware isn’t as clearly defined as some other types of computer hardware. For example, many home routers will often act as a combination router, switch, and firewall.
In addition to all the items listed above, there’s more computer hardware called auxiliary hardware, of which a computer might have none, or several, of some kinds:
- Fan (CPU, GPU, Case, etc.)
- Heat sink
- Data cable
- Power cable
- CMOS battery
- Daughterboard
Some of the devices listed above are called peripheral devices. A peripheral device is a piece of hardware (whether internal or external) that isn’t actually involved in the computer’s main function. Examples include a monitor, video card, disc drive, and mouse.