The book "Encyclopedia of Artificial Intelligence" (Tekoälyn ensyklopedia), edited by Eero Hyvönen, Ilkka Karanta and Markku Syrjänen (1993), was an important landmark in the Finnish AI research and development. Finland has been and remains an important country in this field. Many of the authors were already prominent figures at that time, especially Professor and later Academician Teuvo Kohonen. Since then many authors have become processors in different universities. One of the authors, Tuomas Sandholm received in 2003 the IJCAI Computers and Thought Award and serves as a professor at Carnegie Mellon University.