The Academic Orthopaedic Society (AOS) will hold its annual meeting, Oct. 31-Nov. 1, in Washington, D.C. For registration information, contact the AOS office at (847) 698-1964 . . . Sept. 19 is the deadline for advance registration for the North American Spine Society's (NASS) annual meeting, Oct. 22-25, in New York City. The meeting includes scientific symposiums, paper and poster presentations, breakout sessions and exhibits. Contact the NASS office at (847) 698-1630 to receive additional registration information . . . The Clinical Orthopaedic Society (COS) will hold its annual meeting, Oct. 1-4, in Kansas City, Mo. For more meeting information, contact Anne Malone at the society's office, (800) 843-9735.