Implements

Fork (road), a type of intersection where a road splits
Bicycle fork, the part of a bicycle to which the front wheel is attached
Garden fork, a pronged gardening tool designed for digging
Military fork, a pole weapon used between the 15th and 19th centuries
Motorcycle fork, the portion of a motorcycle that holds the front wheel
Pitchfork, a tined farming tool used to lift and pitch hay and perform other tasks
Tuning fork, a vibrating device used to tune musical instruments
Winnowing fork, a tined farming tool used to separate grain and chaff

Places

Fork (file system), a part of a file in certain filesystems
Fork (software development), when a piece of software or other work is split into two branches or variations of development
Fork (system call), the method whereby a running process creates a new process
Fork (blockchain), a split of the blockchain into two chains or a protocol change
The Fork, an on-line restaurant booking system

Fork (chess), a situation in chess where one piece simultaneously attacks two or more opposing pieces
Operation Fork, the invasion of Iceland by the British during World War II
Fork, in the United States a tributary of a river or other stream