series of additional connectors. USB also allows you to plug-in or unplug a device without having to shut down the computer. This is known as hot swapping or hot plugging. The 2 flavours of USB, 1 and 2 reflect their speeds Firewire is very similar in use, but has different cables. The 2 flavours of Firewire, 400 and 800 reflect their speeds eSATA is a connection that allows for the direct connection to external SATA hard discs.
Modem Modem stands for modulator-demodulator. Simply put, a modem is a device or program that enables a computer to transmit data over telephone lines or other forms of network cable. For example, a "cable modem" uses cable television lines to connect to the Internet. Computer information is stored digitally, whereas information transmitted over telephone lines is transmitted in the form of analogue waves. A modem modulates the digital data into analogue data when sending, and demodulates analogue to digital data when receiving. ADSL, cable modems, and USB mobile networking keys have superseded most other technologies
Mouse A mouse is a small device that you move around on a flat surface using your hand. A pointer on the screen follows your hand movement and acts as a way to provide instructions to the computer. A mouse typically has two buttons to provide extra functionality, a primary and a secondary button. Some mice have what is known as a “scroll wheel� to aid in scrolling within a screen window. Mice are usually placed on the right side of the keyboard, as most people are right-handed. In this case, the left button is the primary mouse button, and the right button is the secondary mouse button. Of course, a mouse can be placed on the left side of the keyboard for left-handed users. In this case, the right button is the primary button, and the left button the secondary button. Using a Mouse The following directions assume the mouse is on the right side of the keyboard. Hold the mouse by resting it in the palm of your hand, with your thumb on one side, and your ring finger and pinkie on the other. Place your index finger on the left button and your middle finger on the right button. Gently and slowly move your wrist from side to side and watch the computer screen (monitor). You will see the mouse pointer (which probably looks like an arrow) moving around the screen. Try moving the mouse pointer all over the screen and get a feel for how it moves.
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