Angstrom : For measuring length of light waves
Barrel : For measuring liquids. One barrel is equal to 31½ gallons or 7,326.5 cubic inches
Cable: For measuring length of cables. It is about 183 m. in length
Carat : Used for measuring precious stones. It is also a measure for the purity of gold alloy
Fathom : It is used for measuring depth of water. One fathom is equal to 4 inches
Knot: For measuring speed of ships
Horse Power : Used for measuring the power of petrol or steam engine
Light Year : A light year is the distance light travels in one year at a speed of 2,97,600 km per second
Nautical Mile : A unit of distance used in navigation - one minute of longitude measured along the equator. A Nautical Mile is approximately equal to 1853 metres
Ohm : The unit of electrical resistance of a conductor
Quintal : Metric measure of weight, 100 kilograms = 1 Quintal.
