Open Access Resources (OPAC)
Open Access Free E-Books/ E- Journals/Databases/Links
Dictionaries
| Sl. No | Name | URL |
| 1. | Photonics Dictionary | http://www.photonics.com/ |
| 2. | International Legal Dictionary | http://www.wwlia.org/diction.htm |
| 3. |
Language Dictionaries & Translators - Includes free translation services, glossary & many more. |
http://rivendel.com/~ric/resources/dictionary.html |
| 4. | Dictionary.com -Definitions from Webster's and more | http://dictionary.reference.com/ |
| 5. | Acronym Dictionary | http://acronyms.silmaril.ie/acro.html |
| 6. | Imagine the Universe : Astrophysics Dictionary | http://imagine.gsfc.nasa.gov/docs/dictionary.html |
| 7. | Free On-Line Dictionary of Computing (Imperial College, London) | http://foldoc.org/ |
| 8. | American Heritage -- Fourth edition has 90,000+ | http://www.bartleby.com/ |
| 9. | Merriam-Webster -Familiar, fast and easy dictionary. | http://www.merriam-webster.com/netdict.htm |
Encyclopaedias
| Sl. No | Name | URL |
| 1. | Encyclopaedia | http://www.encyberpedia.com/ency.htm |
| 2. | Britannica Concise | http://www.britannica.com/ |
| 3. | Open-site Encyclopaedia | http://open-site.org/ |
| 4. | Columbia Encyclopaedia | http://www.infoplease.com/encyclopedia/ |
| 5. | Bartleby (Great Books Online) | http://www.rp-photonics.com/encyclopedia.html |
| 6. | High Bea Encyclopaedia | http://www.encyclopedia.com/ |
| 7. | Encyclopaedia of Laser Physics and Technology | http://www.rp-photonics.com/encyclopedia.html |
| 8. | Wikipedia, The Free Encyclopaedia | http://en.wikipedia.org/wiki/Main_Page |
| 9. | Symbols.com (Online encyclopaedia of western sign and ideograms) | http://www.symbols.com/ |
| 10. | Free and Open General Encyclopaedia | http://www.wikipedia.org/ |
| 11. | Encyclopaedia of the Orient | http://i-cias.com/e.o/index.htm |
Thesaurus
| Sl. No | Name | URL |
| 1. | NASA Thesaurus | http://www.sti.nasa.gov/thesfrm1.htm |
| 2. | Roget's Thesaurus | http://machaut.uchicago.edu/ |
| 3. | The CMU Pronouncing Dictionary (Carnegie Mellon) | http://www.speech.cs.cmu.edu/cgi-bin/cmudict |
| 4. | Controlling your language - links to metadata vocabularies | http://www.jiscdigitalmedia.ac.uk/crossmedia/advice/controlling-your-language- links-to-metadata-vocabularies/ |
| 5. | www Webster Thesaurus (Merriam Webster) | http://www.merriam-webster.com/thesaurus.htm |
| 6. | Infoplease thesaurus | http://www.infoplease.com/thesaurus |
| 7. | Word Net Vocabulary -Provides homonyms, synonyms, and coordinate terms. Helper | http://poets.notredame.ac.jp/cgi-bin/wn |
| 8. | The Semantic Rhyming Dictionary - Use for rhymes, to spell check, to find synonyms | http://www.rhymezone.com/ |