42 Provision of data centre facilities; analysis services for oil and gas field exploitation; software development; engineering services; geological prospecting; geological research; geological surveys; oil prospecting; oil and gas field surveys; oil-well testing; technical project studies; consultancy, information and advisory services relating to surveying, prospecting, exploration, testing, analysing, diagnosing, assaying of petroleum, oil (mineral, vegetable or animal), gas, products of petroleum, oils and gas, hydrocarbons, fuels, combustible products, greases, lubricants and/or chemicals; engineering services