A base unit, also known as a computer case which contains all of the components that make the computer work.Computer cases usually include sheet metal enclosures for a power supply unit and drive bays. |  |
 | A laptop is a personal computer. The laptop has a rechargeable battery which makes this excellent for mobile use. The laptop is powered by mains electricity through and AC adaptor. |
A PC, or a Personal Computer is a general purpose computer. Their are many software applications for personal computers. Today Personal Computer Gaming or PC gaming is a very popular pastime. Gaming computers tend to also be about the looks of the case rather than just the specifications of the hardware. A gaming computer needs to be much more powerful than a PC that someone is using to do office work and to surf the Internet. A Gaming Computer has to have a good graphics card so that it can process all the 3D models and shapes that are on the screen. |  |
 | A Net-Book is similar to a laptop. A Net-Book is smaller and more lightweight than a Laptop, this makes the Net-Book much easier for mobile use. |
A P.D.A is a Personal Digital Assistant. A PDA has an electronic visual display, allowing it to use a web browser, they also have audio capabilities, allowing them to be used as mobile phones or portable media players. Many PDAs can access the Internet, intranets or extranets via Wi-Fi or Wireless Wide Area Networks. Many PDAs employ touchscreen technology. |  |
 | A mobile phone allows calls into the public telephone system. A mobile phone can make and receive telephone calls to and from the public telephone network, which is also mobiles and fix-line phones across the world. |
A personal computer tablet is a small computer that also has the important features of a full-sized personal computer. Tablet PC is essentially a small laptop computer, equipped with a rotatable touchscreen as an additional input device, and running a standard (or lightly adapted) PC operating system like Windows or Linux. |  |
 | There are many different types of games consoles, each different console interacts differently. They also have their own Internet connectivity (Xbox Live Play Station Network). |
A server is a network of computers for storage information, There are many different types of severs, such as Database servers and Files servers. In most common use, server is a physical computer (a hardware system) dedicated to running one or more such services (as a host), to give all information needed to users of the other computers on the network. |  |
 | Embedded devices are small programmable chips that can be programmed to execute certain orders. Embedded systems have processing cores that are either micro controllers or digital signal processors (DSP). An embedded device is being dedicated to handle a particular task. They may require very powerful processors and vast communication, for example air traffic control systems may usefully be viewed as embedded,device. |
