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Computing (FOLDOC) dictionary
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operating system The facility where the user can type more
characters before the system has fully responded to those
already typed. Type-ahead is common on most current systems.
It allows the user to type without worrying that the computer
may miss input because it is temporarily busy,
e.g. reformating a page, checking spelling, or simply
suffering from network latency. There is usually some limit
to the amount of input the system can buffer, beyond which it
_will_ lose input.