Search (46 results, page 2 of 3)

  • × language_ss:"e"
  • × theme_ss:"Datenfernübertragung"
  1. LeVan, R.R.: Dublin Core and Z39.50 (2001) 0.00 
    0.0038307128 = product of:
  0.019153563 = sum of:
    0.019153563 = weight(_text_:of in 1047) [ClassicSimilarity], result of:
      0.019153563 = score(doc=1047,freq=4.0), product of:
        0.06532493 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.04177434 = queryNorm
        0.2932045 = fieldWeight in 1047, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.09375 = fieldNorm(doc=1047)
  0.2 = coord(1/5)
    Footnote
    Teil eines Themenheftes: OCLC and the Internet: An Historical Overview of Research Activities, 1990-1999 - Part II
    Source
    Journal of library administration. 34(2001) nos.3/4, S.229-236
  2. Hickey, T.B.: ¬A Java Z39.50 Client for Browsing Large Databases (2001) 0.00 
    0.0038307128 = product of:
  0.019153563 = sum of:
    0.019153563 = weight(_text_:of in 1051) [ClassicSimilarity], result of:
      0.019153563 = score(doc=1051,freq=4.0), product of:
        0.06532493 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.04177434 = queryNorm
        0.2932045 = fieldWeight in 1051, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.09375 = fieldNorm(doc=1051)
  0.2 = coord(1/5)
    Footnote
    Teil eines Themenheftes: OCLC and the Internet: An Historical Overview of Research Activities, 1990-1999 - Part II
    Source
    Journal of library administration. 34(2001) nos.3/4, S.265-278
  3. Bell, S.J.: Providing remote access to CD-ROMs : some practical advice (1993) 0.00 
    0.0036116305 = product of:
  0.018058153 = sum of:
    0.018058153 = weight(_text_:of in 3748) [ClassicSimilarity], result of:
      0.018058153 = score(doc=3748,freq=8.0), product of:
        0.06532493 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.04177434 = queryNorm
        0.27643585 = fieldWeight in 3748, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0625 = fieldNorm(doc=3748)
  0.2 = coord(1/5)
    Abstract
    Discusses the factors influencing remote access to CD-ROMs: how many CD-ROM workstations are located at the place of work (single or multiple workstations); whether a PC or a CD-ROM LAN is in operation; what level of security is needed in the organisation; how many remote users need to be accomodated; and the level of software sophistication present in the staff of the organisation
  4. Peters, T.A.: ¬The online catalog : A critical examination of public use (1991) 0.00 
    0.0036116305 = product of:
  0.018058153 = sum of:
    0.018058153 = weight(_text_:of in 818) [ClassicSimilarity], result of:
      0.018058153 = score(doc=818,freq=8.0), product of:
        0.06532493 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.04177434 = queryNorm
        0.27643585 = fieldWeight in 818, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0625 = fieldNorm(doc=818)
  0.2 = coord(1/5)
    COMPASS
    Information retrieval / Use of / On-line computers
    Footnote
    Rez. in: College and research libraries 52(1991) S.590-591 (F. Wilson); Journal of academic librarianship 18(1992) no.1, S-40-42 (M.D. Behr)
    Subject
    Information retrieval / Use of / On-line computers
  5. Corey, J.F.: ¬A grant for Z39.50 (1994) 0.00 
    0.003583304 = product of:
  0.01791652 = sum of:
    0.01791652 = weight(_text_:of in 7706) [ClassicSimilarity], result of:
      0.01791652 = score(doc=7706,freq=14.0), product of:
        0.06532493 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.04177434 = queryNorm
        0.2742677 = fieldWeight in 7706, product of:
          3.7416575 = tf(freq=14.0), with freq of:
            14.0 = termFreq=14.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.046875 = fieldNorm(doc=7706)
  0.2 = coord(1/5)
    Abstract
    In Sept. 1990, the US Dept. of Education's Library Technology and Cooperation Grants Program awarded a three-year grant to the Florida Center for Library Automation (FCLA), an agency of the Florida State University System, to develop software adhering to the ANSI Z39.50 Information Retrieval protocol standard. The Z39.50 software was to operate over the OSI communications protocols and be integrated with FCLA's NOTIS system, which is shared by all 9 state universities in Florida. In order to test the correctness of its Z39.50 software, FCLA sought out other library software developers who would be willing to develop Z39.50 systems of their own. As part of this process, FCLA helped to found the Z39.50 Implementor's Group (ZIG), which has since gone on to improve the standard and promote Z39.50 implementations throughout much of the North American library systems marketplace. Early on in the project, it became apparent that TCP/IP would be a more heavily used communication vehicle for Z39.50 messages than OSI. FCLA expanded its design to include TCP/IP and, by the end of the grant in Sept. 1993, will have a working Z39.50 system that can communicate over both OSI and TCP/IP networks
  6. Needleman, M.: Z39.50: a review, analysis and some thoughts on the future (2000) 0.00 
    0.0035690558 = product of:
  0.017845279 = sum of:
    0.017845279 = weight(_text_:of in 4898) [ClassicSimilarity], result of:
      0.017845279 = score(doc=4898,freq=20.0), product of:
        0.06532493 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.04177434 = queryNorm
        0.27317715 = fieldWeight in 4898, product of:
          4.472136 = tf(freq=20.0), with freq of:
            20.0 = termFreq=20.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0390625 = fieldNorm(doc=4898)
  0.2 = coord(1/5)
    Abstract
    This article will examine the Z39.50 Information Retrieval protocol. It will look at some of the history of the protocol, its operation, and some of the major projects that have made use of it. There has been enough written (perhaps too much) about Z39.50 in the last several years so it is not intended to be a tutorial or detailed description of the protocol. The material that will be presented will try and put some context around the discussion. For those readers who are interested in delving into Z39.50 in a more technical manner, references to much of the material that has been written about it over the years will be provided at the end. Finally, the article will conclude with some thoughts on how technology and technological infrastructure have changed in the years since Z39.50 was initially developed and deployed, and where the protocol has so far lived up to its goals, and where it has perhaps failed to meet some of the high expectations that at least some people involved in the Z39.50 community held for it. The article will conclude with some of the author's speculations (and they are really no more than that) of what the future role of Z39.50 is likely to be.
  7. Hinnebusch, M.: Z39.50 at ten years : how stands the standard? (1997) 0.00 
    0.0035331852 = product of:
  0.017665926 = sum of:
    0.017665926 = weight(_text_:of in 1176) [ClassicSimilarity], result of:
      0.017665926 = score(doc=1176,freq=10.0), product of:
        0.06532493 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.04177434 = queryNorm
        0.2704316 = fieldWeight in 1176, product of:
          3.1622777 = tf(freq=10.0), with freq of:
            10.0 = termFreq=10.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0546875 = fieldNorm(doc=1176)
  0.2 = coord(1/5)
    Abstract
    The ANSI Z39.50 standard was adopted 10 years ago. It outlines a set of rules and procedures to allow a computer system to search the databases provided by another system and to retrieve the results of that search. Traces its development adoption in library automation product lines. Recent major developments have been the migration to version 3 and the adoption of community profiles. Community profiles are documents that describe agreements that a community of interest develops to ensure clients and servers can interpret in specific ways. Describes the Government Information Locators Service, WAIS, ATS, ZDSR, Cataloguing, CEOS CIP, Digital Collection, Digital Library Objects and Museum Profiles
    Source
    Journal of academic librarianship. 23(1997) no.3, S.217-221
  8. Moen, W.: Information retrieval protocols : Z39.50 and Search & Retrieve via URL (2009) 0.00 
    0.0033859033 = product of:
  0.016929517 = sum of:
    0.016929517 = weight(_text_:of in 3813) [ClassicSimilarity], result of:
      0.016929517 = score(doc=3813,freq=18.0), product of:
        0.06532493 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.04177434 = queryNorm
        0.25915858 = fieldWeight in 3813, product of:
          4.2426405 = tf(freq=18.0), with freq of:
            18.0 = termFreq=18.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0390625 = fieldNorm(doc=3813)
  0.2 = coord(1/5)
    Abstract
    Information retrieval (IR) protocols support effective and interoperable intersystem search and retrieval. Although intersystem search methods have been envisioned and under development since the 1970s, it was the Z39.50 IR protocol, first released in 1988, that demonstrated real-world possibilities for such search and retrieval. As the networked information environment changed with the emergence of the World Wide Web, the need for standard IR protocols did not disappear, and one can argue the need is even more compelling given both the visible and invisible Web. A new protocol, based on the experience from Z39.50 but simpler and more comprehensible than Z39.50, is now being used for Web search and retrieval. Search and retrieve via URL (SRU) uses Web technologies and standards resulting in a Web friendly protocol that provides standard search access to existing Z39.50 resources and a wide-range of new non-catalog digital resources. This entry provides both an overview of the two protocols and technical details to understand both. A brief discussion of IR and communications protocols provides background to the specifics of these two IR protocols. Although communication protocols are by their nature technical specifications, this entry focuses on an overview of the functions and capabilities of the protocols. It uses technical concepts and terminology from the protocols to help explain how the protocols work but limits discussion of technical details.
    Source
    Encyclopedia of library and information sciences. 3rd ed. Ed.: M.J. Bates
  9. Nordstrand, J.-E.: SUNET (1991) 0.00 
    0.0031922606 = product of:
  0.015961302 = sum of:
    0.015961302 = weight(_text_:of in 3104) [ClassicSimilarity], result of:
      0.015961302 = score(doc=3104,freq=4.0), product of:
        0.06532493 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.04177434 = queryNorm
        0.24433708 = fieldWeight in 3104, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.078125 = fieldNorm(doc=3104)
  0.2 = coord(1/5)
    Abstract
    Describes SUNET, the Swedish University Network, a medium speed network connecting most most mainframe and smaller computers in Swedish universities. Discusses the application of SUNET to remote access to OPACs
    Source
    OPACs and the user: Proc. of the 3rd Anglo-Nordic seminar, Apr. 90
  10. Low, K.: ABCs of OPACs (1994) 0.00 
    0.0031922606 = product of:
  0.015961302 = sum of:
    0.015961302 = weight(_text_:of in 1591) [ClassicSimilarity], result of:
      0.015961302 = score(doc=1591,freq=4.0), product of:
        0.06532493 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.04177434 = queryNorm
        0.24433708 = fieldWeight in 1591, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.078125 = fieldNorm(doc=1591)
  0.2 = coord(1/5)
    Abstract
    Looks at the services offered by academic OPACs. Describes the services provided by Harvard Online Library Information System, University of California MELVYL Catalog, Stanford University' SOCRATES, and Princeton University Library. Many libraries now offer dial-up and/or Internet access to their OPACs
  11. Reddy, E.R.; Pradeep, C.: Internet and Z39.50 : a virtual union catalog (1999) 0.00 
    0.0031922606 = product of:
  0.015961302 = sum of:
    0.015961302 = weight(_text_:of in 352) [ClassicSimilarity], result of:
      0.015961302 = score(doc=352,freq=4.0), product of:
        0.06532493 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.04177434 = queryNorm
        0.24433708 = fieldWeight in 352, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.078125 = fieldNorm(doc=352)
  0.2 = coord(1/5)
    Source
    CALIBER 99: Academic libraries in the Internet: Proceedings of the 6th National Convention for Automation of Libraries in Education and Research, Nagpur, India, 18.-20.2.1999. Ed. by P.S.G. Kumar and C.P. Vahishth
  12. Opacs in the UK : JANET-OPACs (1991) 0.00 
    0.0031922606 = product of:
  0.015961302 = sum of:
    0.015961302 = weight(_text_:of in 799) [ClassicSimilarity], result of:
      0.015961302 = score(doc=799,freq=4.0), product of:
        0.06532493 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.04177434 = queryNorm
        0.24433708 = fieldWeight in 799, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.078125 = fieldNorm(doc=799)
  0.2 = coord(1/5)
    Editor
    University of Sussex Library
    Issue
    A list of interactive library catalogues on Janet ...3 April 1991.
  13. Phifer, L.A.: Tearing down the wall : integrating ISO and Internet management (1994) 0.00 
    0.0031601768 = product of:
  0.015800884 = sum of:
    0.015800884 = weight(_text_:of in 1496) [ClassicSimilarity], result of:
      0.015800884 = score(doc=1496,freq=8.0), product of:
        0.06532493 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.04177434 = queryNorm
        0.24188137 = fieldWeight in 1496, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0546875 = fieldNorm(doc=1496)
  0.2 = coord(1/5)
    Abstract
    The rapid growth of the Internet TCP/IP networks has encouraged the deployment of management products based on the Internet's Simple Network Management Protocol (SNMP). However, many organizations, including most telecommunications service providers, continue to define enterprise management solutions based on ISO/CCITT standard management and underlying Common Management Information Protocol (CMIP). Concludes that the key to achieving timely, effective, integrated management is to encourage a transition process aimed away from existing commercial investment in both ISO/CCITT and Internet based management technologies through deployment of common methods and tools which support integration
    Source
    Journal of network and systems management. 2(1994) no.3, S.317-322
  14. Breaks, M.: SuperJANET : Library and information services over a gigabit network (1994) 0.00 
    0.0031601768 = product of:
  0.015800884 = sum of:
    0.015800884 = weight(_text_:of in 3386) [ClassicSimilarity], result of:
      0.015800884 = score(doc=3386,freq=8.0), product of:
        0.06532493 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.04177434 = queryNorm
        0.24188137 = fieldWeight in 3386, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0546875 = fieldNorm(doc=3386)
  0.2 = coord(1/5)
    Abstract
    Describes the development of SuperJANET, the new optical fibre network for the UK academic and research community. Considers pilot applications for SuperJANET covering library and non library applications and strategic issues to be met for SuperJANET to become an information superhighway. Gigabyte networks will be 1.000 time faster than JANET and will enable sophisticated image and voice communication. SuperJANET uses synchronous digital hierarchy technology. SuperJANET is being developed and and introduced in a number of phases. Discusses supercomputing, library and information services, and strategic issues. Examines the role of technology and librarians in the development of the virtual library
  15. Pospischil, R.: ¬A bypass for the local loop : Deutsche Telekom's strategy for fiber to the home (1995) 0.00 
    0.0031601768 = product of:
  0.015800884 = sum of:
    0.015800884 = weight(_text_:of in 3774) [ClassicSimilarity], result of:
      0.015800884 = score(doc=3774,freq=8.0), product of:
        0.06532493 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.04177434 = queryNorm
        0.24188137 = fieldWeight in 3774, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0546875 = fieldNorm(doc=3774)
  0.2 = coord(1/5)
    Abstract
    Technological and regulatory developments are opening the door for competition and new services in the local loop. The reunification of Germany created an opprotunity for Deutsche Telekom to install fibre in the loop on a large scale in eastern Germany. Deutsche Telekom's strategy consists of 4 steps: fibre in the loop is seen as a process innovation. New broadband services - product innovations - can be based on the process innovation. Only a sufficient number of installations will enable the industry to invest in new products. Besides the local networks equipped with fibre, there is an overlay network for the rapid delivery of fibre access for business customers. The experience gained in eastern Germany will be transferred to western Germany when tranforming its existing network structure
  16. Maier-Rabler, U.: Austrian information highway initiatives in the stage of disillusionment (1996) 0.00 
    0.0031601768 = product of:
  0.015800884 = sum of:
    0.015800884 = weight(_text_:of in 7006) [ClassicSimilarity], result of:
      0.015800884 = score(doc=7006,freq=8.0), product of:
        0.06532493 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.04177434 = queryNorm
        0.24188137 = fieldWeight in 7006, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0546875 = fieldNorm(doc=7006)
  0.2 = coord(1/5)
    Abstract
    Discusses Austrian government policy on the information superhighway (ISH) since Aug. 94. The Austrian telecommunications infrastructure is far behind the standards of Europe. The Austrain PTT monopoly over the public telecommunications network is an obstacle to development. The rates for data services are still based on copper cable with transmission speeds of 9600 Kbps. Although there are various ISH initiatives in Austria, the gap between vision and reality is large. Describes the initiatives of the Austrian National Host and the Bureau for International Research and Technology Cooperation; the Austrian Platform for Telematic Applications; BNet (Burgenland); Telematik Initiative Wien; TELKIS Telekommunikationsinitiative Steiermark; Datahighway Upper Austria; Vorarlberger Telekommunikations GmbH; Telematik Initiative; Datenbahn Telecom GmbH (Salzburg); Ti-KOM (Tirol) and other initiatives
  17. Reiss, L.K.; Merakos, L.F.: Performance analysis of an adaptive bandwidth reservation scheme for ATM virtual path traffic (1996) 0.00 
    0.0031277642 = product of:
  0.01563882 = sum of:
    0.01563882 = weight(_text_:of in 4758) [ClassicSimilarity], result of:
      0.01563882 = score(doc=4758,freq=6.0), product of:
        0.06532493 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.04177434 = queryNorm
        0.23940048 = fieldWeight in 4758, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0625 = fieldNorm(doc=4758)
  0.2 = coord(1/5)
    Abstract
    Adaptive, in-call, bandwidth reservation may be used to enhance bandwidth utilization in a policed asynchronous transfer mode (ATM) virtual path shared by traffic streams originated by many bursty sources. Presents a model, based on Markov-modulated sources and stochastic fluid methods, for performance analysis of the proposed mechanism. The model, corroborated by simulations, is used to study achievable bandwidth gain and the effects of feedback delay and competing reservation processes
  18. Meer, J. de: ¬The ISO reference model for open distributed processing (1995) 0.00 
    0.002708723 = product of:
  0.013543615 = sum of:
    0.013543615 = weight(_text_:of in 3208) [ClassicSimilarity], result of:
      0.013543615 = score(doc=3208,freq=2.0), product of:
        0.06532493 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.04177434 = queryNorm
        0.20732689 = fieldWeight in 3208, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.09375 = fieldNorm(doc=3208)
  0.2 = coord(1/5)
    Abstract
    Details the elements of the ISO Reference Model for Open Distributed Processing. Explores the challenges facing in from multimedia and stream communication
  19. Burton, J.; Newport, J.; Robinson, E.: OPACs and JANET : a simple technique for easy user access (1989) 0.00 
    0.0025538085 = product of:
  0.0127690425 = sum of:
    0.0127690425 = weight(_text_:of in 3107) [ClassicSimilarity], result of:
      0.0127690425 = score(doc=3107,freq=4.0), product of:
        0.06532493 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.04177434 = queryNorm
        0.19546966 = fieldWeight in 3107, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0625 = fieldNorm(doc=3107)
  0.2 = coord(1/5)
    Abstract
    OPACs in an increasing number of libraries are now available using the Joint Academic Network (JANET). Access has tended to be obstructed, for the casual user, by the lengthy JANET addressing codes and varying log-on procedures required by each library system. Discribed how a communications and menu package on an IBK/PC can be used so that by merely pressing cursor control, return and escape keays, any user can gain access to any one of over 40 OPACs linked to JANET
  20. Lewontin, A.: Intracampus sharing of online resources by end users (1991) 0.00 
    0.0025538085 = product of:
  0.0127690425 = sum of:
    0.0127690425 = weight(_text_:of in 3108) [ClassicSimilarity], result of:
      0.0127690425 = score(doc=3108,freq=4.0), product of:
        0.06532493 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.04177434 = queryNorm
        0.19546966 = fieldWeight in 3108, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.0625 = fieldNorm(doc=3108)
  0.2 = coord(1/5)
    Abstract
    Describes the cooperative efforts of computer centre staff and library staff at Bentley College, Massachusetts, to create end user interfaces to enable the locally loaded data bases on the on-line catalogue to be searched off-campus by remote users as well as by library users on campus. Describes the success obtained using 2 data bases: LEXIS and Dow Jones News Retrieval Service

Authors

Years

Types

  • a 42
  • m 2
  • el 1
  • i 1
  • r 1
  • s 1
  • More… Less…

Themes

Subjects

Classifications