The word lock came from Anglo-Saxonloca = "a secure enclosure". Currently lock has several meanings:
A lock (device) a mechanical fastening device which may be used on a door, vehicle, or container. Commonly, it can be released by using a key or combination. See locksmithing.
A canal lock is an enclosure in a canal or river used to raise or lower the water level for ships and boats passing through.
A lock (software engineering) is, in computer science, a bookkeeping object associated with a piece of data used to serialize concurrent access.
Early projectile weapons using gunpowder such as muskets, smooth bore pistols and early rifles are classified by the ignition mechanism (called the lock) used to fire the weapon. These include matchlock, flintlock and wheellock types.
A position in rugby union, numbers 4 and 5. Locks are typically very tall to facilitate catching balls in the line-out. Famous locks include Martin Johnson and Colin Meads.
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Locks of Love is a public non-profit organization that provides hairpieces to financially disadvantaged children under age 18 suffering from long-term medical hair loss from any diagnosis.
Most of the children helped by Locks of Love have lost their hair due to a medical condition called alopecia areata, which has no known cause or cure.
Locks of Love has awarded research grants to the Department of Dermatology and Cutaneous Surgery at the University of Miami Miller School of Medicine to fund research into alopecia areata.
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