Information: ITS nature, measurement, and measurement units

The nature of information is identified, and measures and measurement units for information are developed. There are five fundamental characteristics of information, which together comprise its nature: (1) it is an abstract concept, (2) it is weightless, (3) it does not occupy space, (4) it is observable only by the work it causes, and (5) it is transient and perishable.

Information is concisely defined as the ability to cause work. Because work can be measured, information can be measured by the work it causes. Neural information, in the form of electrochemical impulses, causes muscle tissue contraction which results in mechanical work. Biochemical information, in the form of enzymes, causes the biological work necessary to rearrange biochemical reactants (biochemical reactions). Genetic information, in the form of genes and codons, causes the work necessary to synthesize protoplasm.

Neural, biochemical, and genetic information can be measures by the work thry cause. These measures are equivalent to the extant measures of length, mass, time, temperature, charge, and energy. Units of measure are established for the three forms of information. These units are equivalent to the extant centimeter, gram, second, degree Centigrade, abcoulomb, erg, and calorie measurement units. An individual's behavior is observable by way of mechanical work in the form of muscle contractions, biochemical work in the form of biochemical reactions (metabolism), and work done in the synthesis of protoplasm. Measures of information and the information measurement units provide the basis for developing quantitative living systems and behavioral sciences that can join the community of quantitative hard sciences.