Absolutism -- See Despotism Here are entered works on rule by a monarch with absolute, unlimited power. Works on government by a non-monarchical ruler with absolute, unlimited power are entered under Dictatorship.
Absorption -- See Also Light absorption Here are entered works on the process by which the energy of light radiation is transferred to a medium through which it is passing.
Abstract animation films -- See Abstract films This heading is used as a genre/form heading for nonrepresentational films that avoid narrative and instead convey impressions and emotions by way of color, rhythm and movement.
Abstract automata -- See Machine theory Here are entered works on the abstract mathematical models of devices which operate within a consistent logical system in accordance with a given algorithm; such mathematical theory can be used as a basis for design but is not concerned with hardware.