The American Society for Indexing, Inc. (ASI) is a national association founded in 1968 to promote excellence in indexing and increase awareness of the value of well-written and well-designed indexes. A nonprofit educational organization, ASI serves indexers, librarians, abstractors, editors, publishers, database producers, data searchers, product developers, technical writers, academic professionals, researchers and readers, and others concerned with indexing. It is the only professional organization in the United States devoted solely to the advancement of indexing, abstracting and database construction. ASI encourages the participation of all persons, groups, and organizations interested in indexing and related methods of information retrieval.
Book Indexing Services (BIS) provides indexes in many subject areas, which include STEM (physics, chemistry, medicine, engineering, and management) and humanities and social sciences (history, art, anthropology, consumer affairs, economics, education, religion and social sciences). BIS has more than 15 years of experience in back-of-the book indexing and has indexed more than 500 books.