The core activity of Printscreen GmbH encompasses three main areas: 1. **Web Applications**: Development of web applications from scratch, adaptation of existing web applications, or based on open-source frameworks. 2. **System Engineering**: Planning, implementation, and operation of systems, particularly in open-source environments (Linux, Proxmox, Free/OpenBSD). 3. **IT Consulting**: Independent, professional consulting for companies, authorities, institutions, and private individuals in strategic IT decisions, project management, requirements analysis, architecture and application design, as well as outsourcing.