... the apostrophe in TFO's is only required if you are indicating possession by the TFO.
'The TFO has had a busy day today', can be written as; 'The TFO's had a busy day today'. The apostrophe is showing ommission.
Written without the apostrophe, 'The TFOs had a busy day today', indicates that many TFOs have had a busy day today.
I think that's correct, however this pylut has had a busy evening so far
