"." after abbreviations

     [This is a fast-access FAQ excerpt.]
Fowler recommends putting a "." only after abbreviations that do
not include the last letter of the word they're abbreviating, e.g.,
"Capt." for captain but "Cpl" for corporal.  In some English-
speaking countries, many people follow this rule, but not in the
U.S., where "Mr." and "Dr." prevail.