The purpose of this graduate thesis is to present the methodology, history and scope of contemporary information operations and possible trends of development in military organizations. Information operations are some of the oldest forms of military action which importance is growing in today's information and information society. The first part of the paper presents the methodology of information operation procedures and the historical development of information systems through three representative examples. The main part contains an overview and analysis of all the capabilities of information operations, related activities and abilities. The next section analyzes information security and methods for information protection and management. The last part of thesis includes an analysis of the possible directions of development of information operations based on current trends. The conclusion of the key points mentioned in the paper and the closing words of the author are summarized.