Customer database management, customer loyalty and incentive schemes, marketing services.

Provision of information relating to transport.

Computer programming and design of computer hardware and software for ticketing systems and management of customer information; consultancy services relating to the aforesaid.

Actuators, sensors, instruments and installations, all for measuring, testing and monitoring in research applications; piezoelectric crystals, equipment for the growth and treatment of piezoelectric crystals, strain gauges, piezoelectric and electroacoustic components, piezoelectric resonators, pressure sensors, high-pressure sensors, static and dynamic calibrating systems for high-pressure sensors, acceleration sensors, measuring equipment for determination of the resonance behaviour of piezoelectric pressure sensors, force sensors, distance sensors, optical sensors, capacitive and inductive transducers, microwave sensors; measuring probes and instruments for applications in biotechnology and environmental protection, devices for analysing environmental samples, and microcomputers and microprocessors for such devices; ion-selective sensors based on fluorescence-optical principles of measurement; fluorescence photometers and equipment for spectroscopic analyses; measuring probes and equipment for monitoring sewage or waste water plants and for protection of water bodies; apparatus for determining the concentration of an agent contained in a substance, luminescent indicators, electro-optical measuring instruments, electro-chemical electrodes, microelectrodes, microoptical and micro-electrochemical sensors with evaluation electronics; measuring instruments, measuring apparatus, measuring tools, precision instruments for measuring the interior diameters of pipes, measuring machines, test instruments, test apparatus, testing machines, weighing, signalling and monitoring equipment, flowmeters, thermometers, instruments for measuring structure-borne sound and air-borne sound, flow regulators, pressure regulators, speed regulators; electronic liquid level measuring devices, instruments for measuring pressure vibrations in liquids, instruments for measuring torsional vibrations, capacitive distance meters for upper dead centre of reciprocating engines, equipment for measuring the composition of exhaust gases, densitometers, angle marker generators, photoelectric barriers, microwave interferometers, speed measuring devices, cadence calculators, calibrating devices for sensors and measuring equipment, electric charge amplifiers; laser-optical instruments for investigation of flow phenomena in liquids and gases; diagnosis equipment for internal combustion engines both self-driven and externally driven, monitoring devices for internal combustion engines in operation, measuring equipment for thermodynamic evaluation of internal combustion engines; dynamometric brakes for test stands, facilities for the control of internal combustion engines, partly and fully automated engine test stands and test stands for subassemblies and their components, test stands for the testing of aircraft components; internal combustion engines for test purposes with and without turbochargers, with exhaust gas recycling and storage of combustion gas; ballistic equipment for recording and evaluation of measured values, target detectors, gunpowder analysers, ballistic measurers, ammunition testers for interior ballistics; computer and control programs for the operating and testing of internal combustion engines and for the analysis of exhaust gas emissions, their generation and reduction, and for stresses, strains, vibrations, noise generation, noise propagation and noise radiation; computer programs for flow phenomena and combustion processes inside the engine, and for processes of mixture-forming and mixture-layering; computer programs for simulation of thermodynamic processes; computer programs for simulation of flows, temperature and pressure curves; computer programs for simulation of temperature distribution in solid bodies, especially in components of internal combustion engines and their subassemblies; computer programs for simulation of combustion and detonation processes; computer programs for flow processes and combustion processes, and for processes of mixture-formation, charging and mixture-layering in internal combustion engines, computer programs for external flows around moving parts and bodies, especially landcraft, aircraft and watercraft, computer programs for flows in closed spaces, especially air conditioning applications; computer programs for analysis of exhaust gas emissions, their generation and reduction; measuring probes and measuring instruments for applications in biotechnology, beverage and food technology and environmental protection, their components, microcomputers and microprocessors for these devices; sensors and measuring probes for measuring the oxygen partial pressure, carbon dioxide partial pressure, hydrogen-ion concentration, electrolyte concentration, metabolite and substrate contents in bioreactors, fermenters and apparatus for beverage and food technology; fibreoptical sensors and instruments for simultaneous measurement of various parameters (for instance, oxygen partial pressure, carbon dioxide partial pressure, hydrogen-ion concentration, electrolyte concentration); biosensors and ion-selective sensors based on luminescence-optical principles of measurement; sensors and instruments for trace analysis in the beverages and food industry; optical sensors, reference electrodes, capillary electrodes, electrode test equipment; test stands, apparatus for beverage and food technology; electrotechnical machinery and apparatus.

Medical apparatus and instruments; medical measuring devices and instruments as well as their components, medical therapy equipment; probes for medical purposes, not-invasive and transcutane measuring devices, equipment for the withdrawal of blood; equipment for blood tests and their components, hose pumps, sample feeding devices, devices for determination of the electrolyte contents, hydrogen-ion concentrations, metabolite and substrate contents, and partial pressures of gaseous substances, devices for determining the concentration of an agent contained in a substance, luminescent indicators, luminescence photometers and equipments for spectroscopic analyses, electro-optical measuring instruments, electrochemical electrodes, microelectrodes, optical sensors, immuno sensors, micro-optical and microelectrochemical sensors with evaluation electronics, reference electrodes, capillary electrodes, electrode test equipment, calibrating devices for measuring instruments, all for medical applications; equipment for tumour diagnoses; implantable devices for measuring the composition of body fluids and for automatic medication; medical pulse pressure transducers; artificial sleep and anaesthetization equipment; microcomputers and microprocessors for medical purposes; test equipment and experimentation equipment for medical and biological apparatus and instruments.

Internal combustion engines for land vehicles and parts thereof.

Maintenance of internal combustion engines and vehicles; maintenance of electronic measuring, testing and monitoring devices and of electronic measuring, testing and monitoring facilities; maintenance of medical and biotechnological equipment and instruments, as well as apparatus for beverage and food technology.

Training courses and classes for company personnel and guest engineers in engine design, research and development, and in measurement technology and instrumentation, including shows of cine and video films.

Research in engine construction, measurement technology and instrumentation, engineering, specialised engine engineering services; development, design, calculation and construction planning of internal combustion engines, test engines and parts thereof; mechanical, structural and thermodynamic calculations of combustion engines and compressors using data processing systems; development of machinery and apparatus, test stands, dynamic test stands, simulation test stands, cold test stands, manufacture test stands, test equipment, measuring instruments and experimental gear for engines and machines and ballistics; component development for combustion engines and other engine types; calculation and development of low-emission combustion techniques and lean-fuel engines; combustion photography and high-speed photography for combustion chambers, development of power assemblies, development of vehicles; calculation and development of fuel systems for engines using liquid, solid or gaseous fuels and for injection engines using conventional fuels or alternative fuels; calculation, analysis and testing of the influence of fuels and lubricating oils on exhaust emissions and on the abrasive and corrosive wear of engine components and resulting particle emissions; calculation, analysis and testing of oil consumption based on the metallic components of particle emissions; prediction measurement and analysis of transient exhaust emission; chemical and spectroscopic analysis of exhaust gases and particle emissions; investigation and analysis of noise and vibration characteristics of complete engine and vehicle systems; development and calculation work on noise reduction in engines and gear trains and total systems; analysing and consulting work on internal combustion engines and systems operated by such engines, and on gear trains; development of macroprograms for computer-aided design and computer-aided manufacturing, and computer programs for databank applications; development of computer and control programs for the operating and testing of internal combustion engines and for analysis of exhaust gas emissions, their generation and reduction, and for stresses, strains, vibrations, noise generation, noise propagation and noise radiation; development of computer programs for flow phenomena and combustion processes inside the engine, and for processes of mixture-formation and mixture-layering; development of computer programs for simulation of thermodynamic processes; development of computer programs for simulation of flows, temperature and pressure curves; development of computer programs for simulation of temperature distribution in solid bodies, especially in components of internal combustion engines and their subassemblies; development of computer programs for simulation of combustion and detonation processes; development of computer programs for flow processes and combustion processes, and for processes of mixture-formation, charging and/or mixture-layering in internal combustion engines; development of computer programs for external flows around moving parts and bodies; especially landcraft, aircraft and watercraft, development of computer programs for flows in closed spaces, especially air conditioning applications, development of computer programs for analysis of exhaust gas emissions, their generation and reduction; rental of data processing systems and rental of computer, simulation and control programs for development and research of computer-aided construction and computer-aided manufacturing, of databank applications as well as for operating and testing of internal combustion engines; research and development of apparatus, devices measuring probes and measuring instruments, development of test stands, test equipment and experimentation equipment, preparation of computer programs and control programs, performance and analyses and consultancy, all in the fields of biotechnology, medicine, beverage and food technology and environmental protection; measurements for purposes of environmental protection; rental of medical instruments and apparatus, of apparatus for beverage and food technology and of equipment for environmental protection.