(computing) A portion of memory set aside to store data, often before it is sent to an external device or as it is received from an external device.
(mechanical) Anything used to maintain slack or isolate different objects.
(telecommunications) A routine or storage medium used to compensate for a difference in rate of flow of data, or time of occurrence of events, when transferring data from one device to another.
(rail transport) A device on trains and carriages designed to cushion the impact between them.
(rail transport) The metal barrier to help prevent trains from running off the end of the track.