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Using of open programs in scientific researches

In given article the analysis of the open software which can substitute proprietary programs at universities and research laboratories is carried out. The special attention is given to office (OpenOffice.org, AbiWord, Gnumeric and a number of others) and mathematical (Scilab, Maxima, Octave, etc.) applications. References to official sites of all programs mentioned in article, and also references to descriptions in Russian and English languages ofmentioned free programs are presented.