4 Fuel, in particular crude oil, mazut, gas, natural gas and liquid gas.
9 Data carriers, in particular data carriers with rewrite and recharge capability, including chip cards and encoded magnetic cards, in particular prepaid cards with credit balances and credit limits; electronic apparatus and instruments; meters, in particular electricity, gas, water, waste water and heat meters, in particular meters controlled by the aforesaid data carriers with electricity, gas, water and heat release and cut-off switches, and remote controls therefor; data processing equipment, in particular accounting systems; writing and reading apparatus for the aforesaid data carriers.
36 Financial affairs, debt collection and clearing of bills; issuing of prepaid cards and credit cards, in particular rechargeable prepaid cards for purchasing electricity, gas, water and heat; building and land management.
37 Manual and mechanical cleaning services in the municipal sector, in particular roads and squares, emptying of wastepaper baskets and rubbish bins; building construction, repair, installation services, in particular the construction, maintenance and repair of buildings, roads, bridges, embankments, telecommunications equipment, installations and public networks which supply electricity, gas, in particular natural gas, crude oil, heating and long-distance heating, provide the water supply and drain and treat waste water, in particular in the municipal sector and telecommunications, in particular conduits, including electricity, gas, heating, long-distance heating, water, waste water and telecommunications lines.
38 Telecommunications, in particular the establishment and operation of telecommunications installations and networks.
39 Transport and distribution of electricity, gas, heating, long-distance heating and water, in particular drinking water and waste water, in particular via pipelines; transport of sewage and waste water for households not connected to the waste water network; transport and storage of waste and rubbish, in particular household, industrial and bulky waste; transport of goods and people, in particular by tram and bus.
40 Processing, disposal, in particular incineration, and recycling of waste and rubbish, in particular household, industrial and bulky waste; operation of waste incineration installations; generation of energy; processing of crude oil and natural gas; water treating, in particular the extracting and treating of drinking water.
42 Drilling for and exploitation of crude oil and natural gas, analysis for oil-field and natural gas exploitation; operating public street lighting; baths, in particular swimming baths, Turkish baths and saunas; building and land surveillance.