The core activity of OS-Informatik AG is the provision of IT services, particularly: on-site computer maintenance and support for businesses and private individuals; software installation, training and support; web design; removal of viruses and spyware; internet access, internet telephony and TV; virus and data protection; local and external data backup; and IT systems for offices and businesses. The company also offers sales, consulting and support in the IT sector and assists customers in solving computer problems.