| Extension Name | Extension Type | Platform (OS) | Category | Dev.Company | File Format |
|---|---|---|---|---|---|
| .FC File Extension | FirstClass Settings File | Windows | Settings | OpenText | Unknown |
| .FC File Extension | FirstClass Settings File | Mac | Settings | OpenText | Unknown |
| .REZ File Extension | FirstClass Resource File | Windows | Data | OpenText | Unknown |
| .REZ File Extension | FirstClass Resource File | Mac | Data | OpenText | Unknown |