This volume collects a selected number of papers

presented at the International Workshop on Operator Theory and its Applications

(IWOTA) held in July 2014 at Vrije Universiteit in Amsterdam. Main developments

in the broad area of operator theory are covered, with special emphasis on

applications to science and engineering. The volume also presents papers

dedicated to the eightieth birthday of Damir Arov and to the sixty-fifth

birthday of Leiba Rodman, both leading figures in the area of operator theory

and its applications, in particular to systems theory.