CSG International to Exhibit at Mobile World Congress 2016. CSG Systems International, Inc. (NASDAQ:CSGS) is a market-leading business support solutions and services company serving the majority of the top 100 global communications service providers. The company helps its clients better manage their revenue and customer relationships and more easily launch, scale and monetize new digital services such as movies, music, games, and more. CSG offers a broad portfolio of licensed and Software-as-a-Service (SaaS)-based products and solutions that help clients compete more effectively, improve business operations and deliver a more impactful customer experience across a variety of touch points.
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