System development is the process of creating and implementing software applications, programs, or systems to meet specific business or organizational needs. This field involves analyzing requirements, designing and programming the system, testing and debugging, and finally deploying and maintaining the system. System development can also involve integrating pre-existing systems with new software or making modifications to existing systems to improve functionality. This process typically follows a structured approach, such as the waterfall or agile methodology, to ensure that the final product meets the intended requirements and is delivered on time and within budget.