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Proven track record means that you achievements or some kind of proof to backup your claim that you are a good, experienced worker.
Proven reserves, also called measured reserves, 1P, and reserves, are industry specific terms regarding fossil fuel energy sources. They are defined as a Quantity of energy sources estimated with reasonable certainty, from the analysis of geologic and engineering data, to be recoverable from well established or known reservoirs with the existing equipment and under the existing operating conditions. A reserve is considered a proven reserve if it is probable that 90% or more of the resource is