Q & A on What is a "prototype implementation"? Q: Can you explain " prototype implementation" to me? Thank you very much A: Engineers often build a ``prototype'' after a design but before a final version. The prototype contains all the essential components, is used to verify the approach, test the design (i.e., find its strengths and weaknesses), and provide a basis for further enhancements or a final version. Experimental computer scientists use the same approach -- they build a working prototype implementation of a complex software system (e.g., of a new protocol) to demonstrate its viability and serve as a basis for later versions and enhancements. Often prototypes are functionally equivalent to final products, with only small changes (e.g., logo and copyright notices are added or the software is integrated with other products the company offers).