Spok Holdings, Inc is a holding company that conducts business through its indirectly wholly-owned subsidiary, USA Mobility Wireless, Inc, a leading provider of wireless messaging, mobile voice and data, and unified communications solutions in the United States. In addition, through its indirectly wholly-owned subsidiary, Amcom Software, Inc., provides mission-critical unified communications solutions for contact centers, crisis management, mobile event notification and smartphone information divisions. The company's combined products address customers' mission-critical communication needs. 

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