Typewriters are the definitive ancestor of all key-based text entry devices, but the computer keyboard as a device for electromechanical data entry and communication … See more

One-handed keyboards
Many keyboards have been designed for one-handed operation. The first one, a chorded keyboard, … See more

Keyboards and keypads may be illuminated from inside, especially on equipment for mobile use. Both keyboards built into computers and external ones may support backlighting; external backlit keyboards may have a wired USB connection, or be … See more

Optical character recognition (OCR) is preferable to rekeying for converting existing text that is already written down but not in machine-readable format (for example, a See more

Different types of keyboards are available and each is designed with a focus on specific features that suit particular needs. Today, most full-size … See more

Alphanumeric
Alphabetical, numeric, and punctuation keys are used in the same fashion as a typewriter keyboard to enter their respective symbol … See more

Key switches
In the first electronic keyboards in the early 1970s, the key switches were individual switches inserted into holes in metal frames. These … See more