AIMS AND OBJECTIVES It is planned to publish the accepted papers after the conference in revised full version in the Springer Lecture Notes in Computer Science series (http ://www.springer.de/comp/lncs/authors.html) Your submission is an appreciated support the UNU-IIST (http://www.iist.unu.edu) mission to help developing countries to advance their education and research in computer science The colloquium program will include very good tutorials (tutorial proposal submissions is closed) The International Institute for Software Technology of the United Nations University (UNU-IIST) decides to found an International Colloquium on Theoretical Aspects of Computing (ICTAC). The aim of the colloquium is to bring together practitioners and researchers from academia, industry and government to present research results, and exchange experience, ideas, and solutions for their problems in theoretical aspects of computing. We believe that this will help the developing countries to strengthen their research, teaching and development in computer science and engineering, to improve the links between developing countries and developed countries, and to establish collaboration in research and education. The technical program lasts five days including two days for tutorials and three days for a workshop. We plan to organize such a colloquium every 18 months jointly with a UNU-IIST training school in a developing country, and each time there will be a theme and a focus. The school participants will also attend the technical program of the colloquium. A small registration fee will be charged to cover meals tutorial handouts and proceedings only. There will be also a limited amount of grant that participants, tutorial and workshop speakers from developing countries can apply (click here for more information). Application should be submitted together with their tutorial proposals or papers to the workshop. The first ICTAC will be jointly organized by the Guizhou Academy of Sciences and UNU-IIST during 20-24 September 2004.