Google-Scholars
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Provides a simple way to broadly search for scholarly literature (Free).
| Answers! |
Offers free access to millions of topics from the world's leading publishers.
| Cool and Free! |
Places where you can gather information or just do something really cool online for free.
| Ma Ma Ma IDL |
Each of these popular symbolic and/or numerical mathematics software packages has its strong points. See a brief comparison if you are not acquainted with them.
