Who creates and modifies computer programs?

Computer programs are created and modified by software developers or programmers, who use programming languages to write code that instructs computers on what tasks to perform. They may work individually or as part of a team, collaborating with designers, project managers, and other stakeholders. Additionally, software engineers may be involved in the architecture and design of programs, while quality assurance testers ensure that programs function correctly. Overall, the process involves a combination of technical skills, problem-solving, and collaboration.