posted 22 years ago
Yes. It means to keep hidden things you don't want the outside world to know about, and just provide a public API (application programming interface) for the outside world to use.
That way, since you've kept your internal implementation private, you are free to change it later and no one has to know about that change. As long as the API stays the same, users of your class will continue to use your object just as they always have.