MEDLARS II

MEDLARS II

Medical Literature & Analysis Retrieval System II. A high-performance biomedical information retrieval system created by the US National Library of Medicine (NLM) in 1975 from MEDLARS. MEDLARS II was a computer-oriented bibliographic retrieval and publication system, which included the innovative phototypesetter GRACE and AIM-TWX, the experimental online bibliographic retrieval system. MEDLARS II laid the groundwork in the early 1980s for a new computerised system that would eventually become NLM's Medical Literature Analysis and Retrieval System Online (MEDLINE).
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Later the designers of MEDLARS II for online searching built on the results of this evaluation.
Lancaster continued to work with NLM on vocabulary control, looking ahead to plans for the online environment of MEDLARS II. Harley and Lancaster (1969) analyzed the dynamics of a large controlled vocabulary for online implementation, and coined the term "lexicodynamics" to express the concept of construction, maintenance, use, and change of controlled vocabularies for information retrieval purposes.
We are now looking to MEDLARS II and, on the basis of this report, we should be nothing but optimistic.
To take advantage of new computer developments for online retrieval systems, the NLM embarked on the development of MEDLARS II. An early result was a practical online bibliographic system named AIM-TWX.
Study results were also important for the further development of the MEDLARS II system, from which MEDLINE was introduced in October 1971 as NLM's full online retrieval system.