| title | creator | language | description | tableOfContents | contributor | subject | created |
| Elevator Systems of the Eiffel Tower, 1889 | Vogel, Robert M. | en | | | | | 2010-05-07 |
| IBM 1401 Programming Systems | Anonymous | en | | | | | 2008-12-09 |
| The Psychology of Singing
A Rational Method of Voice Culture Based on a Scientific Analysis of All Systems, Ancient and Modern | Taylor, David C. (David Clark), 1871-1918 | en | | | | Singing; Voice culture | 2007-06-28 |
| History of Religion
A Sketch of Primitive Religious Beliefs and Practices, and of the Origin and Character of the Great Systems | Menzies, Allan, 1845-1916 | en | | | | | 2009-09-02 |
| The New Conspiracy Against the Jesuits Detected and Briefly Exposed
with a short account of their institute; and observations
on the danger of systems of education independent of
religion | Dallas, R. C. (Robert Charles), 1754-1824 | en | | | | | 2010-10-03 |