| Abbreviation | Definition |
|---|---|
| FNDD | Filled Notre Dame des Douleurs |
| FNTN | From Nature To Nature |
| FOAD | Faces Of Angels Destroyed |
| FOB | Freedom Of Belief |
| FOC | Family Of Choice |
| FOC | Father Of the Chapel |
| FOCA | Fellowship of Orthodox Christians in America |
| FOCAS | Fellowship Of Christian Adult Singles |
| FOCAS | Fellowship Of Christian Anglers Society |
| FOCB | Fellowship of Christian Bloggers |
| FOCC | Faith Outreach Christian Center |
| FOCL | Fellowship Of Confessional Lutherans |
| FOCL | Forum of Christian Leaders |
| FOCUS | Facilitating, Organization, Caring, Understanding, and Spirituality |
| FOCUS | Faith Of Christians Uniting Singles |
| FOCUS | Faith On Course Ultimate Success |
| FOCUS | Faith, Order, Credentials, Unity, and Standards |
| FOCUS | Faithful, Obedient, Committed, United Servant |
| FOCUS | Federation Of Congregations United To Serve |
| FOCUS | Fellowship Of Catholic University Students |