This year marks the 50th anniversary of the establishment of the Rare Books and Manuscripts Section (RBMS) of the Association of College and Research Libraries (ACRL), a division of the American Library Association (ALA) - yes, that's RBMS of ACRL of ALA. At the ALA's Midwinter meeting in January, a resolution was passed to salute and commend RBMS "for 50 years of excellence in promoting the value of rare books, manuscripts, and special collections, and providing leadership to the special collections library profession."
You can read a short history of RBMS here.