The core activity of Zerone Computer GmbH encompasses three main areas: 1. **Software Development**: The company creates and maintains software projects in the programming languages VB.NET and C#. 2. **Remote Maintenance and Support**: Zerone Computer GmbH offers remote maintenance support for PC systems, among other things via TeamViewer. 3. **Design and Internet Services**: The company provides a wide range of design services, including web design, corporate design, logo design, print materials (e.g. business cards, flyers, posters) and vehicle lettering.