R.C. Payne wrote:
Mizter T wrote:
Like the sub-surface Underground lines, my unneccesary apostrophe
filter appears to be suffering from poor performance because of the
heat. I shall take the advice of the Tube station posters and drink
some water before I continue my journey on usenet.

It could be argued that words endin in -co as an abreviation for company
could legitmately be made plural by co's as a contraction of companies.
Of course if you were doing that, you should probably write it infra'co's.

Robin

infra'co's would probably not be necessary as I think the one apostrophe
can imply the others[1] but I suspect you would have to write to
singular as infraco' in order to get away with it.

[1] For instance I have seen 'fridge for refrigerator but have never
seen 'fridge'

--
Each day a man watched a donkey walk past a high wood fence with one
plank removed. First he saw the nose, then the ears, then the neck,
forequarters, back and finally the tail. He pondered this for a time
and eventually declared. “I understand now. The nose causes the tail”