As far as I can make out, there's a F0 out there somewhere who is doing some really great work on cinema DTS discs.

Then there's what is apparently the sock named Fo 1, an alternate identity whom we have learned takes inexplicable offense with the mere existence of Fink; and another sock called Fo 2, who takes even greater umbrage with Fink and is inclined to some unfortunate rage issues about it.

But what's most interesting of all is the recent discovery of Zuul Fo 3, who emerges from seemingly-innocuous refrigerators and is theorized by scientists to have taken over as the true identity behind them all. Extreme caution is advised.