System models: client-server archetype, remote data access, device-master replication, peer-to-peer replication, publish-subscribe model, related topologies. Data consistency: best effort consistency,  eventual consistency, casual consistency, session consistency, compund consistency, bounded inconsistency. Replicated data protocols: updates and its contents, recording updates, sending updates, ordering updates. Partial replication and data caching. Conflicts: methods for detection and resolving.  Overview of typical and popular modern mobile technologies. Corporate mobile systems design for small or middle scale campanies. Evaluation of design, variants and price/performance study. Rules of selecting proper devices, services and solutions for selected cases based on market offer. Introduction to network services, administration and handling of mobile system. Case studies and the generalisation of its main ideas.