You can find out when most of the Mersch families immigrated to the United States. You can focus your search to immigration records dating from that era. Immigration records can tell you an ancestor's name, ship name, port of departure, port of arrival and destination.
What is a System Requirements Specification (SRS)? A System Requirements Specification (SRS) (also known as a Software Requirements Specification) is a document or set of documentation that describes the features and behavior of a system or software application.
System Requirements Document (SRD) The System Requirement Document (SRD) defines system level functional and performance requirements for a system. The SRD is derived from the Concept of Operations (CONOPS), system-level performance metrics, mission threads/use cases, and usage environment and is developed but by the program office.