The largest national organization dedicated to the promotion of library service and librarianship. It is also home to 11 membership divisions, each with a type-of-library or type-of-library-function specialization.
An association that represents law librarians and related professionals who are affiliated with a wide range of institutions, including law firms, law schools, corporate legal departments, courts, and government agencies.
The American Society for Information Science and Technology (ASIS&T) is the organization for information professionals leading the search for new and better theories, techniques, and technologies to improve access to information.
Critlib = critical librarianship, a movement to bring critical perspectives and a social justice lens to the library world. This page gives a nice introduction and provides info on regular critlib discussions on Twitter.