Improve and modify existing softwares

Programmers have always reused sections of code, templates, functions, and procedures. Software reuse as a recognized area of study in software engineering. Code reuse is the idea that a partial computer program written at one time can be, should be, or is being used in another program written at a later time. The reuse of programming code is a common technique which attempts to save time and energy by reducing redundant work. We modify existing softwares as user friendly and customer satisfaction and also good to see it.