A text input device. Use this tag to ask programming questions related to typing, keyboard hiding and more.
What topics don't belong here?
If your question is about:
Making a (physical) keyboard: See electronics.SX. (Of course, if you want to implement/imitate a keyboard in software — e.g. an on-screen keyboard — then go right ahead and ask.)
Configuring your keyboard: See superuser.com, unix.SX, or another site that covers using computer systems — Stack Overflow is about programming them.
Interfacing with a device resembling a piano: This is not the tag you're looking for. Move along.