σανίδα, σφαίρα, γη, αγωγούς, κυκλώματα, αριθμομηχανή, υπολογιστή, πρόσβαση, ιούς υπολογιστών, ΙΟΣ υπολογιστη, κέντρο μεταγωγής δεδομένων
Public Domain
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