Barter is the present and the future of international trade, especially for people who is starting in the import export business. Barter and more: Triangular operations.
Classification of mouse
Rolling ball mouse: The rubber ball is driven to the grating wheel with the crystal pulse signal sensor of the light-emitting diode and the phototransistor.
Optical mouse: light source pulse signal sensor with light-emitting semiconductor and photoelectric sensor irradiated by infrared light spots.
Wireless mouse: Use DRF technology to convert the mouse's movement on the X or Y axis, button press or lift information into wireless signals and send them to the host.
The mouse is a very common computer input device, it can position the cursor on the current screen, and operate the screen elements at the position where the cursor passes through the button and the wheel device. The originator of the mouse appeared in 1968, when American scientist Douglas Englebart made the first mouse in California.
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