Κωδικός πρόσβασης, στηθοσκόπιο, ασφάλεια, δυστύχημα, διαχειριστής, επίθεση, λειτουργικό σύστημα, κώδικας, κωδική λέξη, υπολογιστή, ιούς υπολογιστών
Public Domain
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