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

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)

Science Citation Index'' and several new Chemical Abstracts''' indexes are discussed as effective tools for retrospective literature work and a comparison is made of the features of Chemischer Informationsdienst,'' Index Chemicus,'' Chemical Titles,'' and Current Contents'' as the main sources of current chemical information. (9 references)…

The development of scientific journals in Japan pertinent to chemistry is reviewed, and the current status of abstracting activities in Japan is described. (Author)

Scientists and engineers have solved their wordage and most other information problems through the creation and use of information analysis centers (IAC). IAC's synthesize, analyze, and compress pertinent information so that knowledge transfer remains effective. (Author/NH)

The terse conclusion--a brief statement written by one versed in a field after reading a document--is suggested as one answer to the problems of too much to read and of reading many foreign languages. (26 references) (Author/NH)

Conversion of the Chemical Abstract Service scientific literature data base from Standard Distribution Format to a center-oriented file format, STF, is described. A tape file format is described in which variable length logical records, possibly longer than the blocksize, may be stored safely. (7 references) (Author/NH)

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)…

The Cambridge Crystallographic Data Centre is concerned with the retrieval, evaluation, synthesis, and dissemination of structural data obtained by diffraction methods. This paper describes the use of a computer-based file system of both bibliographic information and numeric data to produce a compendium of interatomic distances. (10 references)…

A new, universally applicable computer program is described for the whole complex of punched card oriented literature documentation. Its characteristics are: modular construction, therefore easily adapted to user-specific problems; extremely high searching capacity; comprehensive and elastic syntax makes possible new unconventional methods of…

Implications of research findings comparing structural characteristics of two data bases for the development of screening systems for substructure search are set out. (4 references) (Author/SJ)

Some of the interactions, between the National Technical Information Service (NTIS) of the Dept. of Commerce, and the Federal agencies that generate the reports that are in the NTIS system are described. Problems that result from this system of interagency cooperation are described also. (2 references) (Author/SM)

The Scientific Documentation Center of the Romanian Academy acts as the focus of information activities. The organization of this activity and the individual tools are described, emphasizing the needs of chemistry and chemical engineering. (12 references) (Author/NH)

The Information Flow System is a large-scale information retrieval system developed for processing of Du Pont information files. As currently implemented, the system stores and retrieves information on company technical reports. Extensions of the system for handling chemical structure information and on-line processing are also discussed. (3…