1) Computer keyboard 
A keyboard buffer is a section of computer memory used to hold keystrokes before they are processed. Keyboard buffers have long been used in command-line processing. As a user enters a command, they see it echoed on their terminal and can edit it before it is processed by the computer. In time-sharing systems, the location of the buffer depends on...
A small amount of memory that stores information on key presses over a short time.
[n] - a buffer that keeps track of key strokes until the computer is ready to respond to them
noun a buffer that keeps track of key strokes until the computer is ready to respond to them