Adapter unit having an ergonomic grip for a personal digital assistant

1. An adapter unit that communicates with a personal digital assistant (PDA), comprising:

a carrier portion that includes two sidewalls and a bottom wall that conform to a surface of the PDA, at least a portion of each of the two sidewalls are curved to partially encompass at least a portion of a display-side surface of the PDA; and

a product identification reader that is encased in the carrier portion and reads a product identification code.

2. The adapter unit of claim 1 , further comprising an expansion connector that facilitates a communication link between the carrier portion and the PDA.

3. The adapter unit of claim 2 , the expansion connector facilitates the communication link between the PDA and the product identification reader.

4. The adapter unit of claim 1 , the carrier portion further comprising at least one of a radio, a CCD imager, an RFID tag reader, a global positioning system technology, and a telephone.

5. The adapter unit of claim 1 , the product identification reader is included between a cover and a bottom wall of the carrier portion.

6. The adapter unit of claim 1 , at least one of the sidewalls is curved to conform to the PDA.

7. The adapter unit of claim 1 , the sidewalls only partially cover respective surfaces of the PDA.

8. The adapter unit of claim 1 , further comprising circuitry that facilitates wireless communications.

9. The adapter unit of claim 1 , further comprising a gripping surface that extends above a top section of a bottom wall of the carrier portion.

10. The adapter unit of claim 9 , the gripping surface comprises more than 20% of the length of the PDA.

11. An adapter unit that communicates with a PDA, comprising:

a carrier portion that includes two sidewalls, and conforms to at least a portion of a front surface of the PDA, the two sidewalls are overlapped by a wall portion of the adapter unit;

an expansion connector that facilitates a communication link between the carrier portion and the PDA; and

a product identification reader that reads a product identification code, and is encased in the carrier portion between a cover and a bottom wall of the carrier portion.

12. The adapter unit of claim 11 , further comprising a battery door that facilitates access to a battery.

13. The adapter unit of claim 11 , further comprising an interface for a PCMCIA compatible module.

14. The adapter unit of claim 11 interfaces to the PDA via at least four surfaces of the PDA.

15. The adapter unit of claim 11 , further comprising a detachable handle grip that extends from a surface of the adapter, the handle grip includes a triggering mechanism that triggers the adapter.

16. The adapter unit of claim 11 , the handle grip includes a power source that provides power to the adapter.

17. An adapter unit that couples to a PDA, comprising:

carrier means that includes two sidewalls and a bottom wall that interface to corresponding surfaces of the PDA, at least a portion of each of the two sidewalls are curved to encompass at least a portion of the PDA;

means for scanning a product dataform with a scanning means, the scanning means housed in the carrier means;

means for processing signals associated with the scanning means; and

an expansion connector that facilitates communications between the carrier means and the PDA.

18. The adapter unit of claim 17 , further comprising at least one of a radio, a CCD imager, an RFID tag reader, global positioning system, and a telephone.

19. The adapter unit of claim 17 , further comprising a power source that provides power to the scanning means.