>Hello Eric,
>
>oc is declared local at top of code, then os creates an od, and then od uses its addobject method to create an object named oc in its init method.
>

A bit off the topic:

May I suggest more description variable names? You can use 128 characters I believe. I am not suggesting Drew Speedie names, but something more than oc would make your code a bit more readable, for you and others.

BOb