The electronic word lists of Mari, Mordvin and Udmurt on the CD are intented to be sources for the study of word derivation and word structure. Each entry word is provided with labels that indicate language form, word class and dictionary sources. iSFOu WordListTool/i is a computer program that has been specially developed for handling such lists. There are three user interface languages in the program: English, Russian and Finnish. The publication consists of a CD and a booklet. The CD contains separate installers for the word lists and and the computer program.