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# remote communication systems
# International Communication and Media System
# direct communication systems
# Analog and digital communication systems
# Types of communication systems
# analog communication system
# remote communication in information systems
# The concept of communication system and its importance
# The importance of communication in the social system
# Communication and its importance in the social system
# Communication and social order
# Social system and communication
# Characteristics of communication in a social system
# The concept of communication in the social system
# Skyvington Communication Systems and Communication Science
# Types of administrative communication systems
# Research on information and communication system
# information and communication systems
# Analogue system in communication
# Analogue system in digital communication
