Computer broadly consists of software and hardware. Computer hardware comprises of the physical parts of a computer; the part of a computer you can see or touch. Whereas the software of a computer is collection of written programs that make the hardware functioning.

Basic hardware components of a computer are as follows:

PC case:
PC case also known as Cabinet, Box, system unit, etc is the metal enclosure, which houses and mounts motherboard, power supply and drives. Cases come in two different styles of tower and desktop. Tower is more popular now a days. PC case consists Central Processing Unit (CPU), hard disk / solid-state drive, motherboard, network interface controller, power supply, Random-Access Memory (RAM), sound and video card.

  • Motherboard: Motherboard or mobo is the main circuit board of a computer. It contains all the important computer components like CPU, BIOS, memory, mass storage interfaces, serial and parallel ports, expansion slots, and all peripheral devices controllers, such as the display screen, keyboard, and disk drive.
  • Power supply: The power supply supplies current to the units of computer. It converts AC (alternating current) to DC (direct current).
  • Data Storage: All the data is stored in the computer’s memory. The internal or the primary memory is the memory which is continuously accessed, whereas the secondary or auxiliary memory is not accessed directly by the CPU, like hard drive,  flash USB drives, memory cards, etc.

Removable Data Storage:
Removable storage is basically used to transfer data. These devices are can be removed without switching off power. Some commonly used removable external storage are optical disks, magnetic tapes, memory cards, USB drives, external hard drives, etc.    

Data Ports:
Data ports are ports which help in exchanging data between computer and peripherals. Examples of data port are as follows Ethernet, FireWire, USB, Thunderbolt, etc.  

Input /Output Peripherals:

  • Input devices are required to feed data / signals into a computer. Some input peripherals are keyboard, mouse, joy stick, touch screen, optical mouse, etc.
  • Output devices generate human readable output. Some output devices are printers, speakers and monitor.

Speeds of hard drive, range from 7200 to 15000 rpm. If the drive rotates faster, then the transfer rate is higher. But, the fast rotating drives gets heated up faster and makes more noise.

Related Information

USB Data Recovery
External data devices like USB flash drives can lose stored data if you improperly eject the drive. You might abruptly pull the USB drive and realise the data is missing. To recover important USB data, read the above link that provides easy restoration procedures.

How Can I Restore My External Hard Drive Data
This is a very frequently asked question. Users mistakenly format entire hard drive, while trying to format another partition. As formatting erases all the content of a partition or drive, important data would be lost. To retrieve hard drive data from the external disk, follow the simple recovery steps.

How to Recover Data from a Crashed Hard Drive
Severe virus attack can crash your computer's hard drive. A crashed hard disk malfunctions and stored data cannot be accessed properly. Hard drive can crash due to other reasons like improper shut down or MBR corruption. To understand and learn more about crashed hard drive data recovery follow the above link.

Safe and Secure
Safe and Secure