The report also suggests that biometric fingerprint technology can be implemented in a stand-alone manner or could be incorporated with smart cards, digital signatures, or other technologies. Optical, capacitive, pressure, ultrasonic, and thermal technologies dominate the market. Optical fingerprint biometric access control systems segment was valued at over USD 900 million in 2014; it is expected to grow at a CAGR of 7.5% over the forecast period.