2nd Year ICT
A hard drive is where all the computers information is stored. Every time you press the save button all the information is written on to the disk or saved on the SSD card. When you need/want to access your files/applications the hard drive spins round and retrieves it for you. SSD cards are much smaller and faster but more expensive but do the same thing. SSD stands for solid state drive as it doesn't move. The computers that contain SSD cards are much lighter, thinner and much more expensive.
The optical drove is where you insert CDs, DVDs and BluRay. It does this by a small red laser that projects on the disk and reads information. This machine can also write things on your disks.
The monitor enables you to see what you are doing without this you would not be able to see what you are doing. This works by an ultra-violet light that is then filtered which projects as coloured lights.
CPU (Central Processing Unit)
The CPU (Central Processing Unit) is essentially the brain of the computer. Basic knowledge, maths and lanuguages. The CPU has imprved in speed but the idea/design has barely changed since the early 1960's. Most computers contain CPU's but some dont rely on them and have a vector processor.
RAM stands for Random Access Memory. It enables you to access files really really quickly.