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Online public access catalog. The online public access catalog ( OPAC ), now frequently synonymous with library catalog, is an online database of materials held by a library or group of libraries. Online catalogs have largely replaced the analog card catalogs previously used in libraries.
Enciclopedia Libre Universal en Español (English: Universal Free Encyclopedia in Spanish) is a Spanish-language wiki -based online encyclopedia, released under the Creative Commons Attribution-ShareAlike License 3.0. It uses the MediaWiki software. It started as a fork of the Spanish Wikipedia .
Sharpless catalog. The Sharpless catalog is a list of 313 H II regions (emission nebulae) intended to be comprehensive north of declination −27°. (It does include some nebulae south of that declination as well.) The first edition was published in 1953 with 142 objects (Sh1), and the second and final version was published by US astronomer ...
Open educational resources ( OER) [1] are teaching, learning, and research materials intentionally created and licensed to be free for the end user to own, share, and in most cases, modify. [2] [3] The term "OER" describes publicly accessible materials and resources for any user to use, re-mix, improve, and redistribute under some licenses. [4]
The Online Books Page is an index of e-text books available on the Internet. It is edited by John Mark Ockerbloom and is hosted by the library of the University of Pennsylvania . [2] The Online Books Page lists over 2 million books [3] and has several features, such as A Celebration of Women Writers and Banned Books Online .
Online-only since 2009, covers works and writers of world literature: Subscription The Literary Encyclopedia: English Literature related articles Subscription Oxford Art Online: English Visual art; formerly Grove Art Online and The Dictionary of Art. Originally published in 1996 as a 34-volume printed encyclopedia; offered online since 1998.
Michel catalog. The Michel catalog ( MICHEL-Briefmarken-Katalog) is the largest and best-known stamp catalog in the German -speaking world. First published in 1910, it has become an important reference work for philately, with information not available in the English-language Scott catalogue .
A papyrus fragment containing the beginning of the Atlantid Electra's family from book 3 or 4 (Cat. fr. 177 = P.Oxy. XI 1359 fr. 2, second century CE, Oxyrhynchus). The Catalogue of Women (Ancient Greek: Γυναικῶν Κατάλογος, romanized: Gunaikôn Katálogos)—also known as the Ehoiai (Ancient Greek: Ἠοῖαι, romanized: Ēoîai, Ancient: [ɛː.ôi̯.ai̯]) —is a ...