From the mathematical point of view, the nat is a more natural unit of information, but whose magnitude is less intuitive than the shannon or hartley. In each case, formulae for the quantification of information capacity or entropy involve taking the logarithm of an expression involving probabilities. If base-2 logarithms are employed, the result is expressed in shannons, if base-10 (common logarithms) then the result is in hartleys.