PESLA is a student report writing program designed to do a grammatical analysis of a language sample. The user types and translates a language sample of up to 100 utterances. The computer then analyzes the sample and provides the following analyses: percentage correct of specific demonstratives, locatives, pronouns, articles, conjunctions, prepositions, possessives, comparatives, superlatives, copula be, modals, past tense markers, and present progressive markers. In addition, the user is provided with a list of auxillary + verb, infinitive, past tense, and present progressive verb forms. At the end of the analysis there is a summary table of the percentage correct of all of the above grammatical markers, number of affirmative, negative, and question sentence types, number of utterances, number of words used, and mean length of response. Other program features include: language sample editing, printout of results, printout of corpus, ability to save a corpus for later retrieval and analysis, and a tutorial for coding a language sample. Another program, Parrot Language Sample Utility (PLSU), allows users to modify PELSA to analyse transcript information according to any coding scheme; PLSU sells for $59.50. COMPATIBILITY: For use on IBM and compatible computers. SYSTEM REQUIREMENTS: Microsoft Windows 98, 2000, XP, Vista or Windows 7 with 128 megabytes (MB) RAM.