Abstract: The present invention involves cases and overlays for a handheld electronic devices used for data entry. The case comprises a cover portion and an overlay portion having one or more actuatable keys for interacting with an enclosed electronic device without direct physical contact of the device by a user. Optionally the overlay portion includes one or more openings which allows a user to directly contact the enclosed device. Interchangeable overlays are also disclosed allowing for different combinations and configurations of keys and/or openings depending on the electronic device being used and the desired task being performed.