The annual IDIMT conferences, established in 1993, are today an established platform for scientific information interchange in the wide, interdisciplinary filed of computer science and informatics. On the occasion of the 25th Anniversary in 2017 this the booklet provides a retrospective on the long history and evolution of the IDIMT conferences, detailing for each conference some essential aspects of each conference with respect to location and their contents. It also presents statistical data about the development of the conference which now proudly contains around 50 papers and a proceeding volume of 450 pages.