The specialty field is used to classify machines into several convenient or special categories to make searches easier.

The specialty categories used by the Internet Pinball Machine Database include the following:

Wide-Body Machine — These games have wider playfields and cabinets than "standard" games of the same period. This additional space allows designers to add extra features to the playfields that give them a unique play feel, but which cost more to produce.
As an example, Indiana Jones, a popular wide-body game, has a 25" wide cabinet/playfield, while other games of that period have a 22 1/2" wide cabinet/playfield. Backboxes of the wide-body games are usually the same width as the "standard" games.