Several computer systems are discussed. 'PoMor' is a commercial product (morphological analyser and spelling checker) developed by Robert Wolosz for Morphologic. 'Morfeusz' is a morphologic analyser developed by Marcin Wolinski. 'Poliqarp' (POLyinterpretation Indexing Query and Retrieval Processor) developed by Zygmunt Krynicki and Daniel Janus is used to search in a corpus of Polish (http://korpus.pl). Both 'Morfeusz' and 'Poliqarp' are freely available for research purposes. The linguistic tools of Michal Rudolf are also mentioned. The paper advocates the use of 'lex' instead of 'word' or 'segment' for better precision and clarity.
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