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People, businesses, schools, hospitals and apartment building owners all buy intercom systems and use them for communication purposes. Intercom system retailers and intercom system service companies specialize in selling and installing intercom systems. Some intercom companies specialize in selling intercom systems to individuals and installing them into homes. People like having intercom systems to help with security and to monitor children. Many intercom systems can play music in addition to being used as two-way communication devices. Some intercom companies specialize in making the intercom systems that double as public address systems and are found in most schools, hospitals and some office buildings. Some intercom companies make intercoms for apartment buildings. Many intercom companies make wired intercom systems and wireless intercom systems.
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