Primož Jakopin (pron. Premozh Yacopeen), born 30 June 1949 is a Slovenian computer scientist, known for his work in the field of language technology and his contribution to speleology. Early life and education Jakopin was born in 1949 in Ljubljana, Slovenia. The family lived in the village of Leskovec pri Krškem, Dolenjska region and in 1956 moved to Ljubljana. After a degree in technical mathematics (Numerično računanje singularnih integralov / Numerical Computation of Singular Integrals) at the University of Ljubljana in 1972, he obtained a master's degree in information sciences with the thesis Entropija imena i prezimena u Sloveniji / On entropy of first names and last names in Slovenia at the University of Zagreb in 1981 and in 1999 a Ph.D. with the thesis Zgornja meja entropije pri leposlovnih besedilih v slovenskem jeziku / Upper Bound of Entropy in Slovenian Literary Texts, again at the University of Ljubljana. Computational linguistics He was a senior lecturer at the Department of Comparative and General Linguistics, Faculty of Arts, University of Ljubljana. His subjects of instruction are language technologies with stress on Lemmatisation. From 2001 to 2012 he was the Head of the Corpus Laboratory at the Fran Ramovš Institute of Slovenian Language (within the Scientific Research Centre of the Slovenian Academy of Sciences and Arts). He participated in a number of European projects on language resources. His major pieces of software: IBIS for the Digital DEC 10 mainframe computer, 1981, INES for the ZX Spectrum microcomputer, 1985, STEVE (ATARI ST, 1987-1992), EVA for DOS, 1992- and Microsoft Windows family of operating systems, 1996-, NEVA - Windows server search engine, 1999-. From 1992 to 1994 he supervised the transfer of the Standard Slovenian Dictionary (SSKJ) from printed to electronic version (EVA OCR, DOS version). In 1997 he wrote the first part-of-speech tagger for Slovenian texts. In 1999 he started an Internet text corpus, with a concordance service and linked wordform and reversed wordform frequency dictionaries. It is available as Nova beseda (New word). Speleology In high school, he read the book Kraški svet in njegovi pojavi / Karst world and its phenomena by Pavel Kunaver and especially because of its photographs by Bogumil Brinšek, Jakopin became interested in speleology. In 1966 he joined Ljubljana Cave Exploration Society (DZRJL) to learn more about caves and to participate in exploration of new caves. As a mathematician he was particularly interested in the principal cave