| API | Description | Category | Date |
|---|---|---|---|
| Numbers | Number reference service | Reference | 2012-03-16 |
| Pearson Correlation Coefficient | Calculator for the Pearson Correlation Coefficient ρ | Tools | 2011-02-22 |
| Reflection IT Calculator | Simple calculator service | Tools | 2013-02-15 |
| RIOJA Journal Repository | Scholarly article data retrieval service | Science | 2012-01-05 |
| Spearman Correlation Coefficient | Mathematics tool | Tools | 2012-05-16 |
| Wiris Quizzes | Educational content service | Education | 2012-06-06 |





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