Division of labor refers to the division of a complete job into various stages or parts.
Generally, efficiency refers to the quality as well as the quantity of work done.
The word labor is used in Economics as a term. In common conversation labor refers to any mental or manual exertion like study of a student, carrying luggage by a loader or teaching of a professor etc.
Use of petroleum begins from some 5000 years ago. Liquid Crude oil and the Bitumen (Asphalt) were used by different ancient civilization such as Sumerians, Babylonians, Assyrians and Egyptians.
National income is a part of Macroeconomics as it is counted over by a Government.
Constructive complaints are solution oriented, versus unfiltered rumination on negative experiences.
explaining electrochemistry and chemical energetics is the worst thing ever.