Existing System Enhancements / Conversion
Add extra functions to an existing system - enterprise wide or small/medium.
This could be an enterprise software package, such as SAP, which does nearly everything - except ... We will fill the gap with an Access/Visual Basic based system.
Or, this could be an existing Access system which needs an added function.
Provide user documentation and training where new staff take over an existing system.
"Service" an existing system - reduce error messages and improve efficiency.