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OPAs versus EEFs
I think I can understand the differences between OPAs and EEFs in most situations, except the following three described as EEFs and which keep coming up in exams:
- HR & Personnel records
- Commercial Databases (but not the data contained within)
- PM Information Systems (but not Work Authorisation Systems)
To me all three look like OPAs.
Can anyone advise or point me to any links which can explain this so I can understand better?