ηλεκτρονική πλακέτα, υπολογιστή, πρότυπο, αριθμομηχανή, μπλοκ αλυσίδα, τυπωμένου κυκλώματος, αρχεία, Σύστημα, επικοινωνία, μηχανισμός, μπλοκ δεδομένων
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