: Comprehensive operating instructions or repair guides. Engineering Drawings : CAD files or blueprints for hardware.
Because "part1.rar" indicates a multi-part compressed archive, it usually contains high-density information such as: CDRL-019.part1.rar
In the context of United States military contracting, a is a standardized list that identifies all the data deliverables a contractor must provide to the government. : Comprehensive operating instructions or repair guides