md masud (@masud270)
A computer keyboard is a device that is similar to a typewriter. This is because it uses a well arranged buttons or keys to act as mechanical levers or electronic switches. Computer keyboard is seen as a more reliable input method for computers than the punch cards and paper tape. The buttons or keys on the computer mainly have symbols printed on them. Each pressed key corresponds to the engraved symbol.
However, some of these symbols can be produced by pressing and holding more than one key simultaneously or in sequence. Most times, this process produces actions or executes commands in the computer.https://hangsene-liquid.