mouse ahead /vi./ Point-and-click analog of `type ahead'.
To manipulate a computer's pointing device (almost always a mouse
in this usage, but not necessarily) and its selection or command
buttons before a computer program is ready to accept such input, in
anticipation of the program accepting the input. Handling this
properly is rare, but it can help make a WIMP environment much
more usable, assuming the users are familiar with the behavior of
the user interface.
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