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By Thomas M. Stockwell
RPG is a great language with a long history of IBM commitment. But the focus of IBM's evolution for the language has been almost exclusively upon enhancing the language for ease of newprogram development and increasing functionality.
RPG Not Optimized for Maintenance
What has not been IBM's focus has been ease of maintenance.
It's easy with the User Application Information APIs!
By Bruce Vining
I received the following from reader Kiernan M.:
"Your articles are giving me all kinds of ideas for improving our system.... Is there an API that lets me recall previous usage information like how SEU does with *PRV?"
As this would be an extremely short article if this capability was unavailable, it's safe to assume that there are indeed APIs to assist you in retaining previous usage information.
By Thomas M. Stockwell 
By Bruce Vining