Mathematicians and mechanical and computer engineers explore the use and management of information technology in a range of fields and contexts. The topics include reviews and a case study of creating believable and effective artificial intelligence agents for games and simulations, letter and word frequency and the mathematical modeling of the frequency distributions in the modern Bulgarian language, a decomposition theorem of generalized interval-valued intuitionist fuzzy sets, a new efficient evolutionary algorithm applied to optimal reactive power dispatch, and the multi-objective optimization of bioethanol production through hydrolysis using Hopfield-enhanced differential evolution. Annotation ©2014 Ringgold, Inc., Portland, OR (protoview.com)