A lot of computer-related words in Russian are borrowed with small modifications from English (or from where English took them). Nobody says "electronnaya vychislitel'naya mashina" anymore, they say "computer". Same for file, register, class, object, compiler (kompilyator), algorithm... It happens that tutorials for some computer-related subjects - especially some niche ones - are available only in English. It sometimes help that programming languages use English language base for keywords, so there is less confusion with Russian words.