Digest of the 12th symposium sponsored by the Nat. Inst. of Standards & Technology (NIST) in cooperation with the IEEE Lasers & Electro-Optical Society & the Optical Society of America, Sept. 24-26, 2002, NIST, Boulder, Colorado. There are 51 papers, 9 invited & 42 contributed. More than half of the papers originated outside the U.S. Topically, the papers are more diverse than usual. Except for polarization-mode dispersion, which fills three sessions this year, there is a fairly even distribution across the measurement subjects of nonlinear behavior, fiber & waveguide geometry, group delay, dispersion, wavelength, polarization, multimode fiber, & systems modeling.Williams, Paul A. is the author of 'Technical Digest : Symposium on Optical Fiber Measurements, (2002)', published 2003 under ISBN 9780756737849 and ISBN 0756737842.