Multiple-Element Arrangements. Contracts with our customers usually relate to either the delivery of product or the completion of technology or engineering research and development contracts. In a very limited number of cases, a research contract may involve the creation and delivery of a customer-designed product sample based upon the research and development efforts completed. Pursuant to ASC 605-25-25-5, Revenue Recognition - Multiple-Element Arrangements, we have concluded that product revenue should not be considered a unit of accounting separate from the service revenue for these types of research contracts.