main file

Noun
  1. (computer science) a computer file that is used as the authority in a given job and that is relatively permanent (synset 106521893)
    referred to in: computer science, computing - the branch of engineering science that studies (with the aid of computers) computable processes and structures
    is a type of: computer file - (computer science) a file maintained in computer-readable form
    same as: master file

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