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Liam MacLeod

on 16 September 2013

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Transcript of Computer

Input / Output Devices
CPU/BIOS, Operating System
The CPU (central processing unit) is the brain of the computer. It does all of the calculations. The BIOS (basic input/output system) is the basic commands for the CPU so is knows how to function. It is software built into the computer and is the first software that runs when the computer is turned on. The operating system is triggered by the BIOS and is a more sophisticated input/output system.
In the computer, there are two kinds of memory that the CPU needs: ROM and RAM. ROM (read only memory) cannot be changed and tells the computer how to do things, like turning on. RAM (random access memory) is short-term memory and temporarily stores information for the CPU, like what you just typed in. RAM is like writing down the address of a party you are going to. Because it is helpful to remember the information in the short term, but not important to remember it forever.
The motherboard is a circuit board, which is a board that mechanically supports and electrically connects all of the microchips. Microchips are a set of electronic circuits on one small plate. The motherboard holds components of the computer and lets the parts(microchips and other components) communicate with each other.
The computer uses inputs to produce outputs. Input is anything connected to the computer that sends it information. Examples of this are microphones, cameras and keyboard which has all of the letter of the alphabet written on keys which you can press, like a piano. An output is something that the computer produces using the inputs. For example, a monitor, which is flat box which shows moving pictures, and sound speakers which produce sound. There is also something called a printer which layers ink onto sheets of paper and the location of the ink depends on what the computer dictates. Modems are both input and output devices. They can receive and transmit information between computers via a network, like the internet.
Hardware is anything that is part of your computer that you can touch and feel. Software is the instructions that the hardware in a computer follows. It is crucial for the computer to function. Software includes operating systems and programs. The operating system is the visual interface that the user sees. Programs are independent and perform a variety of tasks. Software and operating systems are created by programmers who do programming, which means writing computer instructions using a language the computer understands.
Every thing here is hardware
This is a mouse it is an input
This is a CPU.
This is a Motherboard.
Disk Drives
Disk Drives are devices that remember information on a disk and stores the computer's information like a book. This information is in long term storage, like a library.

The hard drive is built into a computer. Some disk drives use removable storage disks such as floppy disks, DVDs and CD roms. Removable drives are forms of storage that can be removed from one computer and inserted into another computer for ease of use, transferring its information.

All input and output devices are called peripherals. A peripheral is anything you connect to the computer externally.
The internet is what computers all around the world use to communicate with each other, like how telephone wires connect telephone. But the internet communicates much more efficiently and can transmit data. This data can be anything, like a picture, or words (text).
Impact on Society
Computers have a huge impact on society. Most people carry computers wherever they go. Computers are being used constantly. If someone has a question they can consult their computer for the answer, making it less important for someone to remember facts.
Some of the uses of computers include

- Mathematical Calculations
- Communication
- Entertainment
- Documentation
- Banking
- Telecommunications
- Defense
- Business
- Dating
- News
- Weather Prediction
The disadvantage of computers
Computers have possibly had a very detrimental effect on generations gowning up with them because they do not need to know spelling because computers will correct it. Computers are also making it less important for children to memorize facts. Computers have also made teenagers less social. They will often opt to be social on the computer rather than face to face.
Impact on the environment.
Where I am from, humans are using our planet's resources faster than the planet can generate them. Computer manufacturing is part of the problem. Computers require heavy metals such as lead, arsenic, cobalt, zinc, and germanium. This problem made worse by the fact that computers become obsolete every few years. This is because new computers are constantly becoming faster and more powerful and software is usually not supported for older computers. This is creating a huge amount of waste. It also creates the need to mine more toxic metals, which puts even more strain on ecosystems.
This is RAM (Read Only Memory)
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