FRS Full Form in Software Engineering? The FRS full form in software engineering is the abbreviation for Functional Requirements Specification. A functional requirement specification (FRs) is a document that describes what a system should do, how it should work, and what its capabilities should be. FRs are written in natural language and use terms that describe the function of the system rather than describing the physical characteristics of the system. Functional requirements specifications are often referred to as functional requirements,…