A special feature on some mice- it is a button that allows you to ‘double click’ by only pressing it once.

A type of keyboard with diagonal keys to prevent hand exhaustion.

These general keys allow you to carry out a multitude of other functions. These can be things such as launching the calculator program or shutting down your PC.

Directional keys on a keyboard including up, down, left and right arrow keys. They move the cursor to in various directions.

Pressing or releasing mice button once and without moving the pointer. It is mainly used to select a special item or deselect it, and to activate a program.

Maximum interval between the first and second presses of a mouse button.

Keyboards can be used to type commands. Example: by pressing Ctrl-Alt-Delete, a window appears on display.

Pressing Ctrl and other key, changes their functions. In many operational programs, it is used to make a special command.

This is an abbreviation of "Counts per Inch" and it is the correct unit for measuring Resolution.

Pressing and releasing a mouse button two times without moving the mouse. Double clicks are mainly used to choose or activate a program or its functions.

This is an abbreviation of “Dots per Inch” and it is used to describe resolution. It should be noted that while DPI is the most popular term used to describe resolution, the correct technical term is CPI.

This technology allows a mouse to be used on virtually any surface.

A device with several ports for connecting different devices to each other and to a single other plug. They exist in many forms from special networking hubs to USB hubs..

These buttons include functions such as Next, Back, Reload, Stop, and Favorites. They optimize your browsing experience and speed.

The ability to press several computer keys on your PC at any one second in time. This is important for gaming keyboards where complex commands need to be entered in any given second.

Height of keys from keyboard surface.

The time it takes to transfer a ‘keystroke’ from your keyboard to your PC.

The act of pressing a keyboard button.

These are the most advanced mice available today. They work by using a laser beam to take very precise measurements of the mouse’s movements. Resolution of laser mice can be anywhere between 1000 DPI/CPI to over 3000 DPI/CPI. Laser mice can easily be used on most surfaces.

An input device which lets you communicate with a computer. Most mice fit into the palm of your hand and have a cable which connects them to a PC. The simplest mice have two buttons but more advanced mice contain scroll wheels, additional buttons, and other features. There are three types of mice: optical, sub-laser, and laser.

A set of keys such as Play, Pause, Next, Previous etc. which can be used to control music or video without having to use the mouse.

Special buttons on some devices that allow you to use Microsoft Easier. These buttons can include functions such as Cut, Copy, Paste, Excel, Word, Mark, and so on.

These are the most common mice available today. They normally have a resolution of between 400 and 800 DPI/CPI. They work by lighting up the surface they are working on with a LED light – then they proceed to take measurement images (see resolution). As such, when they are used on dark or glass surfaces they have problems taking measurements.

A board connected to the bottom of a keyboard to make it more comfortable to use. Some palm rests are built in to a keyboard, while others are removable.

A plug or ‘port’ used to found on the end of many computer accessories. PS/2 plugs are common on many devices – especially older ones.

This is a measure of how ‘accurate’ and precise a computer mouse is. The measurement works by counting the number of reference points (or images) taken by mouse in a specific distance. This measurement is called the Counts per Inch (CPI). The more images that are taken by a mouse, the more accurate it is – it also usually means the mouse moves faster.

A function that exists on many products. A scroll wheel is a knob that can be rolled up or down. This allows you to scroll up or down through the pages on a computer screen. Holding the Control (Ctrl) button while scrolling also acts as a zoom key.

Sub-Laser mice are effectively second generation optical mice. Their advanced technologies allow them to have performances similar to mid level laser mice-but with optical mouse technology and prices.

A plug or ‘port’ used to found on the end of many computer accessories. This is a replacement for PS2 plugs and most modern computers have several USB ports. You can connect up to 128 devices to each USB port if you want. Using USB is also easy because you can simply plug in your device and it should start working. It should be noted that there are two versions of USB, however they both work with each other. USB 1.0 is the old slow version and USB 2.0 is a much faster and newer version.

Unlike most keyboards, these keyboards have no cables attached to them. Thus you can use them easily wherever you are. These types of keyboards are equipped with batteries and communicate with the PC by means of a transmitter and receiver. They can use infrared, Bluetooth, RF radio, or other technologies to do this.