Q:

Regex find and replace for (AB), (AC), (DD), (OT)

Is there a regex expression to find and replace any parentheses with two CAPITAL letters inside of it?
(AB)
(DD)
(OF)
(TO)

A:

Try this to find two caps inside of parens:
\([A-Z]{2}\)

Replacing them depends on the technology you are using.  In .NET you would look at the Regex.Replace method:
  string input = "some text";
  string pattern = @"\([A-Z]{2}\)";
  string replacement = "replace value";
  Regex rgx = new Regex(pattern);
  string result = rgx.Replace(input, replacement);

