Reinhold, OlafAlt, Rainer2019-01-032019-01-032019-01-08978-0-9981331-2-6http://hdl.handle.net/10125/59702Social Information Systems (SIS) are larger systems of open and voluntary collaboration between involved parties and based on Social Media. Recent research about SIS describes characteristics, constituting elements and research streams. However, detailed analysis about the effects and system design of SIS are still limited. This paper investigates the concept of SIS from the perspective of Customer Relationship Management (CRM). It illustrates similarities and differences between SIS and Social CRM implementations by drawing on existing research and the examination of four cases studies. The findings show benefits and requirements for the adoption of SIS in the field of CRM. On one hand, SIS provide new means for CRM by fostering the creation and nurturing of relationships between business and the market. On the other hand, for realizing these opportunities companies need to further integrate Social Media, CRM and Social CRM from an inside-out and outside-in perspective.10 pagesengAttribution-NonCommercial-NoDerivatives 4.0 InternationalSocial Information SystemsDigital and Social MediaSocial Information System, Social CRM, Information System Design, Case Studies, Social MediaConference Paper10.24251/HICSS.2019.319