1. Electricity companies 1.1. Line construction 1.2. Distribution network maintenance 1.3. Wind power plants
2. Construction 2.1. Installation and maintenance of air-conditioning systems 2.2. Horticulture and tree maintenance 2.3. Glass and building cleaning 2.4. Glaziers 2.5. Roofer 2.6. Painter 2.7. Building maintenance
3. Airport operators and airlines 3.1. Aircraft de-icing
4. Media and telecommunications 4.1. Construction and maintenance of cable-TV systems 4.2. TV and film production 4.3. Photographers 4.4. Construction and maintenance of transmission systems
5. Local and municipal authorities 5.1. Traffic sign maintenance 5.2. Street lighting 5.3. Emergency damage repair 5.4. Bridge maintenance