Keith,
the most popular is Ford / Edsel but it might in fact just stand for "Ford Engine" as in quite a few of the older service parts catalogues you get all sorts of differant Ford engines described as an FE.
Just to confuse things further the "FE" in a truck is designated "FT" for Ford Truck and to make matters worse they added an extra cubic inch for the truck engines, as in 361 and 391 for a 360 and 390. In reality they were exactly the same capacity, very strange !
I am sure some of our colonial friends will tell you something differant, though, later in the day.
Mike