| title | creator | language | description | tableOfContents | contributor | subject | created |
| Famous Affinities of History — Volume 4
The Romance of Devotion | Orr, Lyndon | en | | | | Biography; Love; Women -- Biography | 2003-11-01 |
| Opportunities in Aviation | | en | | | | | 2007-11-21 |
| Acres of Diamonds: our every-day opportunities | Conwell, Russell Herman, 1843-1925 | en | | | | Success; Temple University | 2008-06-29 |
| Famous Affinities of History, Vol 1-4, Complete
The Romance of Devotion | Orr, Lyndon | en | | | | Love; Biography; Women -- Biography | 2003-11-01 |
| Famous Affinities of History — Volume 2
The Romance of Devotion | Orr, Lyndon | en | | | | Love; Biography; Women -- Biography | 2003-11-01 |
| Opportunities | Warner, Susan, 1819-1885 | en | | | | Conduct of life -- Juvenile fiction; Family life -- Juvenile fiction; Christian life -- Juvenile fiction; Sisters -- Juvenile fiction; Wealth -- Religious aspects -- Juvenile fiction | 2009-10-01 |
| Opportunities in Engineering | Horton, Charles M. (Charles Marcus), 1879- | en | | | | Engineers; Engineering | 2008-02-24 |
| On The Affinities of Leptarctus primus of Leidy
American Museum of Natural History, Vol. VI, Article VIII, pp. 229-331. | Wortman, Jacob Lawson | en | | | | Leptarctus primus; Paleontology -- Miocene; Paleontology -- Nebraska | 2008-09-05 |
| Famous Affinities of History — Volume 3
The Romance of Devotion | Orr, Lyndon | en | | | | Women -- Biography; Biography; Love | 2003-11-01 |
| Famous Affinities of History — Volume 1
The Romance of Devotion | Orr, Lyndon | en | | | | Love; Biography; Women -- Biography | 2003-11-01 |