Apple’s System 7 project was a huge undertaking. By the end of the development process, there were close to 1,000 people working on the project. In a project that large, with many separate pieces of software that must come together into a coherent whole, it is sometimes difficult to keep everything together.
Apple helped avoid some of the problems by forming a software integration team whose job it was to oversee the technical side of the development process and to make sure that everything worked together properly. This small group of talented programmers was known as the Blue Meanies.
The Blue Meanies are often erroneously given credit for writing all of System 7. Although their contribution was crucial to the success of the System 7 project, they were only a small fraction of the total group of people working on the project.