Help me complete this puzzle related to computers.. mostly technical term or software name will be the answer

Try to complete this puzzle

Either a technical term or software name will be the answer.

  • 1
    $\begingroup$ Welcome to PSE and congrats on posting your very first question! Do take some time to visit the help center and get a tour of this site to get a badge. By the way, did you get this from another site? If so, then please give a link to it or something. This puzzle also seems to be incomplete (like the zip file which is not shown and the cut rules on your picture). Nevertheless, happy puzzling :D $\endgroup$ – Kevin L Sep 4 '18 at 8:10
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    $\begingroup$ Apparently this is the photograph of an e-mail. Can you please reformat your question: copy the full text as text (including the rules), add the image as an independent image, add the zip file, etc. Please also specify who created the puzzle. Thank you. $\endgroup$ – xhienne Sep 4 '18 at 8:27


The first two lines sound to me like DOS Int21H because it's Interrupt Request 21.
If we convert the numbers 55 45 37 37 to coordinates it points to Moscow on the map

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