A software developer is a person or company engaged in a software development process, including research, design, programming, testing, and other facets of creating computer software. Other job titles for individuals with similar meanings include programmer, software analyst, or software engineer. Companies specializing in software may be called software houses. In a large company, there may be employees whose sole responsibility consists of only one of the disciplines. In smaller development environments, a few people or even a single individual might handle the complete process. Collaborative environments, such as open-source software, can bring together many developers.