I love Select Similar in ADT (ADT 2005 +) and am mystified why it's not a core AutoCAD feature.
Pick a selection set of objects, select similar and all matching objects are selected.
Melanie (S) P has posted a lisp for AutoCAD that achieves the similar results.
Mistress of the Dorkness: I know how to pick em: SelectSimilar routine
In MAP3D 2006 there is a tool, accessed by most via the right-click menu, called SelectSimilar…