In the recent years, social media have rapidly gained an increasing popularity. Companies have recognised this development and anticipate advantages from using social media for commercial purposes. Social customer relationship management (CRM) professionalises the use of social media and aims at integrating customers into operational procedures. This induces changes of existing structures, e.g. culture and organisation, business processes, information systems (IS), data structures, and technology. The intended transformation from CRM to social CRM is a complex task, because different aspects are affected, which also are mutually dependent. A prerequisite for the successful implementation of social CRM is understanding these aspects and its dependencies. Separation of concerns is a useful means of addressing complexity. The conglomeration of different issues is dissolved by conceptualising components and its relationships. This paper separates the concerns of social CRM using architectural perspectives and aims at building a better understanding. The research method is a literature review in which artefacts are gathered and assigned to five layers, which are business, process, integration, software, and technology. The conclusion states that social CRM is an emergent research field and comprises a call for more artefacts that concretise abstracted components of the business-layer.