Abstract: Disclosed herein is a single portable computing device with components for secure authentication and subject identification with a set of integrated electronic diagnostic instruments that accompany a healthcare or veterinary professional as he or she examines or treats a subject before moving to another subject in another location. The device has a network interface so that secure access can be afforded to an electronic application for updating and observation. The disclosure permits clinicians to examine subjects and securely access protected information from an electronic medical record or similar veterinary application at different locations, that also reduces risk of transmitting infection, improves and facilities secure authentication and subject identification.