APO DP - use of tables for selections and notes

I am using APO DP V5.

I note that tables for holding selections and notes are planning area specific and have tables names such as /1APO/S1nnnnnnnn and /1APO/F1nnnnnnnn respectively.

My questions:

1. What is the logic for the naming of these tables

2. For a given planning area, are the tables names the same as one moves from Development to QA to Production environments

Thanks,

Bob Austin