Since when has indexmedicus been edited and published by computer?
1964.INDEX MEDICUS, abbreviated as IM, is edited and published by the National Library of Medicine (NLM), which is the most commonly used comprehensive medical literature retrieval tool in the world. 1964 A medical index and medical literature analysis and retrieval system (MEDLARS for short) processed by electronic computer was established. The retrieval method mainly consists of author index and subject index.