Computer Hardware

2nd Year ICT

Hard Drive/SSD

A hard drive is a place to save files and is able to retrieve them back again. It is a self-contained device that has a very high capacity and is practically indestructible. It has a little arm that studies the information, and then engraves minute lines of memory into a disk. This disk holds all the files and memory of the computer.

An SSD ‘Solid State Disk’ and a ‘flash drive’, is a more modern, newer, faster and lighter version of the old hard drive. An SSD contains special memory cells which are able to receive and erase data. An SSD can hold on to data even without a power source, whilst a hard drive cannot. As well as this, hard drives are noisier whilst SSD’s are almost silent. SSD’s are also a lot faster than the usual hard drive, and has no moving parts which have a chance of malfunction.

Optical Drive

An optical drive is a piece of equipment that reads data useing a laser and electromagnetic wavelength. Also known as a 'optical disk drive' (ODD), it reads or writers data onto a optical disk. Disks, DVD's and Bluerays are common types of ODD's. ODD's are also used to read media onto a computer.

Monitor

A computer monitor is the display part of the computer. It is also called the 'screen' or the 'electronic visual display'. It is made of a thin film that contains transistor liquid and the liquid crystal display.

The monitor is comprised of three sections: the display device, the circuitry and the enclosure. These monitors were built originally to process all the data of a computer, and television receivers were the parts used for enetertainment and games. After the 1980's, the computers and monitors were combined and both were used for both data processing and entertainment.