The equipment used for positioning on the screen to enter data into the keyboard. I used to write or type on a computer monitor positioned on the tube, or CRT has often used with programs aided design or CAD (computer aided design), so the work is more convenient. You can easily drag or draw direction. However, accurate level. It is limited by the resolution of the display. Currently less popular.
การแปล กรุณารอสักครู่..
