16. A scanner for attachment to a PDA having a camera comprising: a housing means, adjacent the PDA, for visually targeting a subject to be scanned; and an optical channel, adjacent the camera, for directing light from the subject to be scanned to the camera; wherein the optical channel includes a reflecting element and a refracting element between the camera and the subject to be scanned; and, a light source passing light energy through the reflective element and onto the subject to be scanned.
16. A scanner for attachment to a PDA having a camera comprising: a housing means, adjacent the PDA, for visually targeting a subject to be scanned; and an optical channel, adjacent the camera, for directing light from the subject to be scanned to the camera; wherein the optical channel includes a reflecting element and a refracting element between the camera and the subject to be scanned; and, a light source passing light energy through the reflective element and onto the subject to be scanned. 19. The scanner of claim 16 including a light source reflected by the reflective element and incident on the subject to be scanned.