Psychological Operations or
PSYOP or
PSYOPS are planned operations to convey selected information and indicators to specific audiences to influence their emotions, motives, objective reasoning, and ultimately the behavior of governments, organizations, groups, and individuals. The purpose of psychological operations is to induce or reinforce attitudes and behavior favorable to the originator's objectives.
See also Psychological warfare, Information warfare.
External link
http://www.iwar.org.uk/psyops/