Computer systems include the computer along with any software and devices that are necessary to make the computer works. The computer will only successfully start up if everything that is needed on the computer is set correctly. If one device in the computer has a problem or wasn’t set properly, the starting up of the computer will show it.
The computer system includes 4 layers - people, network, software and hardware. Hardware is tangible and it makes up the physical computer. There are six components - the motherboard, CPU, RAM, case and power supply. If one is missing the computer will not work properly or you will not be able to start up the computer.
The motherboard is like the main hardware of the computer, it controls the other hardwires, CPU, RAM... The motherboard is a important part of a computer. The CPU (Central Processing Unit) is like the brain of the computer, the CPU is cover by the heat sink and the fan. The heat sink and the fan help the CPU to cool down, in case the CPU goes over heat. The CPU works with the computer code, the computer will send the computer code to the CPU and the CPU will eventually work out the result. The RAM that is known as the random access memory is a component that allows the computer to send packages. The more RAM there are, the amount of packages sent will increase.
Software of the computer is much different from hardware, there are two kinds software. There are application software and operating software. The operating software is software to operate the computer, for example programs like Windows, MAC OS X, and Linux. The application software are included different types of programs like games, Microsoft, document, spread sheet…
The network system can be extremely complicated, but it can be easy to understand at the same time. The network system is like a spider web that was made out of different connection between computers around the world. A successful network to be made, is when multiple computer that are successfully linked and connected to each other. There are two types of network, the first one is LAN (Local Area Network) and the second one is WAN (Wide Area Network).
The Local Area Network is a Network that has an amount of area that computer can connect with, so if the computer is too far away, the computer won’t be able to connect the other computer. Using LAN can be connected be two ways, it’s either by wired or wireless. Wired LAN needs an Ethernet cable to connect and a wireless LAN will uses radio waves to connect.
The Wide Area Network is a Network that covers a large amount of area, the WAN are often connect with public networks, just like the telephone. Comparing the Wide Area Network to the Local Area Network. The LAN contain a higher speed of connection but a small amount of area, and the WAN contain a lower speed of connection, but a large area of connection.
Lastly the people, there are online community for people to use, for example Facebook, Twitter, Myspace, emails ... These online community are for people to communicate easily with higher technology. With these improvement of technology comparing to the history, the online community are improving from the time. People are using these online applications to share information, chat, mailing and commenting. Looking at the history comparing to now, researching is much more easier. In the past, people's resource for searching are limited, but now people got online resource to use and researching online is much more useful than other types of research resource.
