35 Temporary employment agencies.
36 Financial affairs, fund investments, credit bureaux, real estate and housing management, real estate and mortgage brokerage, financial management, renting of flats, insurance.
37 Plumbing, electricity, gas and water installations, pipeline laying; installation, assembly and maintenance of heating, ventilation and air-conditioning apparatus; rental of machines, tools, and apparatus for electricity, gas and water installation and operating electricity, gas, heating and water works; installation and maintenance of heating installations for others.
38 Telecommunications, operating telecommunication networks, in particular local information networks, telephone networks, transmission of audio-visual data and information.
39 Transport and distribution of energy, electricity, heating, local heating, gas and water, included in class 39; transport of gases, liquids and solids by pipeline, included in class 39; storage; transport of valuable materials and waste; collection and transport of waste water; vehicle rental for the transport of valuable materials and waste; rental of collection containers and depot containers for the collection of valuable materials and waste.
40 Production of energy, electricity, heating and local heating; production of energy, electricity and heating by heating installations in independent devices and objects; recycling and composting of valuable materials, household and industrial waste; treatment of waste water; treatment of gas, in particular natural gas and town gas; treatment of water, in particular drinking water and service water.
42 Incineration of household and industrial waste; building drafting and consultancy for energy production and distribution installations and recycling installations for valuable material and waste incineration installations; engineering services, physics research, chemistry services, surveying, technical consultancy and expertise; computer programming, data processing for others, for a fee.