[plt-scheme] %, @, ^, etc.

At Sun, 7 Sep 2003 08:00:49 -0400, Geoffrey Knauth wrote:
> Every so often I see %, @, and ^ at the end of procedure, variable or 
> module names.  Is there a place where the conventions on their use is 
> listed?

Perhaps not, so let's make one:

 %    ->  class
 <%>  -> interface
 @    -> unit, especially a signed unit
 ^    -> unit signature

Did I miss any?

Matthew