Study of Keyboard/ MouseTypes of keyboard

Cordless/wireless keyboard Bluetooth keyboard

Cordless/wireless keyboard it is the latest addition to the family of keyboard the usage of cordless keyboard has a lot of advantages. You can place the keyboard according to your convenience and com. It is based upon infrared technology. Cordless key run on batteries.

Bluetooth keyboard it is the bluetooth technology.Bluetooth is a short-range wireless technology. It Eliminates the use of cable.The main advantage of bluetooth keyboard over the wireless is that wirless keyboard ranges up to 6 feet where as bluetooth keyboard range up to 30 feet.

Mouse Douglas engeelbart invented the compute mouse in 1983 it is a device that enables computer user to move the cursor or pointer to as specific ponit on the screen. It is called the mouse because the appearance and movment are very similar to that of the mouse.

Types of mouse

Laser mouse

bluetooth mouse

cordless mouse

serial mouse

Laser Mouse it is new technology has recently emerged piggy backing off of the led optical mouse laser based optical mouse works similar to the LED based optical mouse. It uses a laser instead of a LED the benefit is that because it uses a laser beam the moue can track much better giving ite user response times,tracking and the ability to be used on more surfaces.

Bluetooth mouse it is bluetooth mouse connects with pc through bluetooth technology. It provides freedomtowork any where up to or with in range it controls yor computer up to 30 feet from your to notebook

desktop.

Cordless mouse it is cordless mice establishes an infrared or radio link with a transceiver (transmitter) receiver that is connected to the computer through a cable cordless mouse is very convenient and easy to use cordless m ice operate on batteries.

Ps/2 mouse

The PS/2 connector is a 6-pin Mini-DIN connector used for connecting some keyboards and mice to a PC compatible computer system. Its name comes from the IBM Personal System/2 series of personal computers, with which it was introduced in 1987. The PS/2 mouse connector generally replaced the older DE-9 RS-232 "serial mouse" connector, while the PS/2 keyboard connector replaced the larger 5-pin/180° DIN connector used in the IBM PC/AT design. The PS/2 designs on keyboard and mouse

interfaces are electrically similar and employ the same communication protocol. However, a given system's keyboard and mouse port may not be interchangeable since the two devices use a different set of commands.

Serial mouse

The trackball a related pointing device, was invented in 1946 by Ralph Benjamin as part of a post-World War II-era radar plotting system called Comprehensive Display System (CDS). Benjamin was then working for the British Royal Navy Scientific Service. Benjamin's project used analog computers to calculate the future position of target aircraft based on several initial input points provided by a user with a joystick. Benjamin felt that a more elegant input device was needed and invented a ball tracker called roller ball for this purpose.