All OPERA V5 standard reports can be found in the User Guide/F1 Help, which is available to the public from:
Direct link to the latest user guide (release 5.6):
Direct link to OPERA PMS Reports within this user guide:
Direct link to OPERA S&C Reports within this user guide:
Beyond being just a list, these articles provide further information regarding the purpose of the reports, how to set parameters, and what information becomes available as a result.