OPA file extension - Psion OPL object file
What is opa file? How to open opa files?
File type specification:
The opa file extension is associated with a range of personal digital assistants Psion Series 3 with SIBO operating system (also known as Symbian or EPOC) made by Psion PLC.
The opa file stores OPL object.
The Psion Series 3 is obsolete.