ITAL Information Technology and Libraries (E-Journal)
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LC/MARC on MOLDS; An Experiment in Computer-Based Interactive Bibliographic Storage, Search, Retrieval, and Processing
Get PDFA project at Syracuse University utilizing MOLDS, a generalized computer-based interactive retrieval program, with a portion of the Library of Congress MARC Pilot Project tapes as a data base. The system, written in FORTRAN, was used in both a batch and an on-line mode. It formed part of a computer laboratory for library science students during 1968-1969. This report describes the system and its components and points out its advantages and disadvantages
Standardized Costs for Automated Library Systems
Get PDFCosts of automated library systems as currently given in published reports tend to be misleading and confusing. It is necessary to have a clear under- standing of how they were derived before any comparisons can be made. Clearly defined costs in terms of time units are more meaningful than straight dollar costs and can be used as one means of comparison among various system designs and as guidelines for the design of new systems
Levels of Machine Readable Records
Get PDFThis study of the feasibility of determining levels or subsets of the established MARC II format concludes that only two levels are necessary and desirable for national purposes: 1) the full MA.RC II format for distribution purposes; and 2) a less complex subset to be used by libraries reporting holdings to the National Union Catalog
Methods of Randomization of Large Files with High Volatility
Get PDFKey-to-address conversion algorithms which have been used for a large, direct access file are compared with respect to record density and access time. Cumulative distribution functions are plotted to demonstrate the distribution of addresses generated by each method. The long-standing practice of counting address collisions is shown to be less valuable in fudging algorithm effectiveness than considering the maximum number of contiguously occupied file locations
A Scatter Storage Scheme for Dictionary Lookups
Get PDFScatter storage schemes are examined with respect to their applicability to dictionary lookup procedures. Of particular interest are virtual scatter methods which combine the advantages of rapid search speed and reasonable storage requirements. The theoretical aspects of computing hash addresses are developed, and several algorithms are evaluated. Finally, experiments with an actual text lookup process are described, and a possible library application is discussed
A MARC Based SDI Service
Get PDFAn operating SDI service utilizes the weekly MARC II tapes distributed by the Library of Congress. The history, creation, operation, uses, advantages, disadvantages, cost and future plans for the SDI service are discussed, and flow charts (system and detail) and sample output given
Processing of MARC Tapes for Cooperative Use
Get PDFA centralized data base of MARC II records distributed by the Library of Congress is discussed. The data base is operated by the Oklahoma Department of Libraries and is available to any library that can make use of it. The history, creation, operation, uses, advantages, disadvantages, cost and future plans of the data base are included, as well as flowcharts (both system and detail) and sample outputs
On-Line Serials System at Laval University Library
Get PDFDescription of a system, operational since June 1968, that provides control of all serials holdings in nine campus libraries, permits updating of the complete file every two or three days, and produces various outputs for library users and library staff from data in variable fields on disks (listings, statistics, etc.). The program, presently operating on an IBM 360/50 and utilizing an IBM 2314 disk-storage facility and three IBM 226 CRT terminals, is written in IBM System/360 Operating System Assembler Language and in PL/I; it could encompass a file of no more than 10 million records of variable length limited to 127/255 characters and subdivided in 25 or fewer fields