Negentropy vs. Extropy — What's the Difference?

In information theory and statistics, negentropy is used as a measure of distance to normality. The concept and phrase "negative entropy" was introduced by Erwin Schrödinger in his 1944 popular-science book What is Life?

Negentropy.

(thermodynamics) The difference between the entropy of a system and the maximum possible entropy of the same system.

The pseudoscientific prediction that human intelligence and technology will enable life to expand in an orderly way throughout the entire universe

(information theory) The difference between the entropy of a probability distribution and the maximum possible entropy of the same probability distribution.