Most folks are about as happy as they make up their minds to be.*

FindFolder Folder Types

Red background:

MacOS and Classic

Blue background:

OS X (and maybe iPhone OS?)

Boldface term:

default for code (others are synonyms)

****:

anything (for paths, varies by OS version or is randomized)

Tested on 10.4 and 10.7-10.11 (forgot µdoc on 10.7+; will remedy soon.)

Paths are shown here in POSIX form for diskname independence, although AppleScript returns them in 'alias' form. Default path is for unspecified domain (OS X); folder domains are System domain ("flds"), network domain ("fldn"), local domain ("fldl"), user domain ("fldu"), and [at least for OS X thru 10.5.x on PPC] Classic domain ("fldc").

'path to' syntax equivalents on OS X:

path to application support from user domain
path to «constant afdrasup» from «constant fldmfldu»
path to «constant ****asup» from «constant ****fldu»
path to "asup" from "fldu"

Footnotes:

Some OS error codes that AppleScript may return:

For further information, see the following articles:

• TN 1102: Mac OS 8: Folder Manager
• TN 1142: Mac OS 8.5: Folder Manager (full technote)
  TN 1142: Mac OS 8.5: Folder Manager (just this part)
• Mac OS 8: Folder Manager: Folder Type Constants
• Mac OS 8: Folder Manager: Manipulating Folders
• Mac OS 8: Folder Manager: Result Codes
• Mac OS 8: Folder Manager: Gestalt Selector
• Carbon Folder Manager reference

In addition to documentation sources, the following script was used:

property c3s : "abcdefghijklmnopqrstuvwxyzƒ"
property c2s : "abcdefghijklmnopqrstuvwxyz"
property c1s : "abcdefghijklmnopqrstuvwxyz"
property c0s : "abcdefghijklmnopqrstuvwxyzƒ"
set b to (current date)
set x to {}
repeat with c3 in c3s
   repeat with c2 in c2s
      repeat with c1 in c1s
         repeat with c0 in c0s
            set c to (c3 & c2 & c1 & c0)
            try
               set p to POSIX path of (path to c)
               set end of x to (c & tab & p & return)
            on error number errn
               if errn is -5000 then
                  try
                     set p to POSIX path of (path to c from user domain)
                     set end of x to (c & tab & p & "****" & return)
                  on error
                     set p to "Could not create folder in user domain."
                     set end of x to (c & tab & p & "****" & return)
                  end try
               end if
            end try
         end repeat
      end repeat
   end repeat
end repeat
return x as text

(Seems I forgot to include mu for µdoc in my script; I will remedy that soon.)