Software Engineering (SE) is the application of a systematic, disciplined, quantifiable approach to the design, development, operation, and maintenance of software, and the study of these approaches; that is, the application of engineering to software. In layman's terms, it is the act of using insights to conceive, model and scale a solution to a problem. The term software engineering first appeared in the 1968 NATO Software Engineering Conference and was meant to provoke thought regarding the perceived "software crisis" at the time.