TY - GEN AU - Yee-Yin Choong AU - Mary Theofanos AU - Brian Stanton AU - Patrick Hofmann C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2009-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.IR.7645 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2009 TI - Symbols representing biometrics in use: ER -