Existing methods for coding chemical compounds are discussed and evaluated as to their suitability for documentation of chemical reactions, a new classification for chemical reactions is presented, and possibilities of automatic encoding are studied. (24 references) (Author)

A program (FORMULA) is described which translates the systematic chemical names of steroids to structural formulas which, with a suitable graphic output device could be used for direct typesetting. (10 references) (Author)

The computerized conversion of Wiswesser Line Notations to Ring Codes, using a two-part approach, and the set of computer programs generated for the conversion of ring systems are described. (9 references) (Author)

A method of constructing a check digit for nonconventional chemical codes is described. (5 references) (Author)

Automatic processing of the bibliography on vapor-liquid equilibrium data is done by means of a specially developed mnemonic coding system. (Author/JB)

The boundary between two neighboring rings is called the fusion lines, which is enclosed by external segments called arcs. In the code, the separation of fusion line(s) from arcs takes place in such a way that proper matching is achieved. By this procedure, the structure of a compound is recreated. (Author)

A Teletype Model 37 machine has been modified for the coding of chemical structures. The coding rate of this model is higher than that of other machines of this type. The rationale for choosing this particupar type of input equipment is presented. (6 references) (Author/SM)

A program is described which identifies functional group interconversion reactions, hydrogenations, and dehydrogenations in a data base containing structures encoded as Wiswesser Line Notations. Production of the data base is briefly described. (17 references) (Authors)

Analysis of the distribution of relevant answers to 41 search profiles among the 80 subject sections of Chemical Abstracts" revealed that the average profile requires 10 CA-subject sections for adequate coverage. The average printing expense could be reduced 25 percent by searching the individual profiles in the appropriate subject sections. (5…

Almost three million records covering approximately 175,000 chemical compounds and involving multiple disciplines have been recorded in the Army Antimalarial Drug Program. Maximum compartmentalization of files together with a complete method of interfacing files and a unique number system has made it possible to manage this system. (2 references)…

Two systems, WLN and Ringcode, for retrieving structural information were analyzed qualitatively and evaluated for a series of chemical compounds. The studies ranged from specific to generic questions and also involved retrieval by fragments. Neither system was completely satisfactory for all types of searches. (6 references) (Author)

Techniques, media, and systems for making organized data available exist, but have not been used extensively enough. Reasons for failure to use these are explored and recommendations made for extraction by authors at time of writing, centralized organization, and publication through existing organization. Datum signatures are described. (50…

A design is described for a system to manage the information directly related to the experimental work in a toxicological laboratory. A number of distinct input procedures provide data to a set of co-existing data bases. Periodic, event-triggered, predefined demand, and ad hoc reports are posited. (12 references) (Author/NH)

Among other improvements in chemical nomenclature used in the Chemical Registry System, Chemical Abstracts Service intends to standardize the fundamental principles for naming cyclic structures so that procedures for the derivation of ring names can become more amenable to computer generation and translation. (Author/NH)

The Multiterm system is shown to be a unique concept for producing a multilingual index via computer processing. The new concept has significance for international cooperative programs. (6 references) (Author/NH)