Quality assurance is a way of preventing mistakes and defects in manufactured products and avoiding problems when delivering products.
Software development is the process of conceiving, specifying, designing, programming, documenting, testing, and bug fixing. Technology is the continually developing result of accumulated knowledge and application in all techniques and processes.
Custom software development is the process of designing, creating, deploying and maintaining software for a specific set of users, functions or organizations. In contrast to commercial off-the-shelf software (COTS). technology is science or knowledge put into practical use to solve problems or invent useful tools. Technology is best.