In the late 1960s, the Swedish Defence Staff initiated the development of a computerized command and control system that was later to be known as the LEO-system. From the mid-1970s to 1989, more than two hundred million SEK were spent on the project, which involved private computer consultants and with military staff officers acting as project leaders and customers. In the end, however, only the intelligence application was introduced and put into operational use in the Swedish intelligence service during the 1990s. This paper will tell the story of the LEO-system and outline some of the reasons behind its failure. It is based on a witness seminar held at the Swedish Armed Forces Headquarters in Stockholm on January 15, 2008.