“A Dictionary of Orthodox Terminology”
Fotios K. Litsas of the University of Illinois at Chicago maintains an online dictionary of terms associated with Orthodox Christianity.
Faith: Christianity
“Baker’s Evangelical Dictionary of Biblical Theology”
See Baker’s Evangelical Dictionary of Biblical Theology posted by StudyLight.org. It shows how names, themes, and ideas have developed throughout the Old and New Testaments.
New Advent: “Catholic Encyclopedia”
NewAdvent.org posts an online encyclopedia of terms relevant to Catholicism.
BibleStudyTools.com: Dictionaries
BibleStudyTools.com posts links to online Bible dictionaries.
“Dictionary of Theology”
The Christian Apologetics & Research Ministry provides a continually-updated dictionary of terms associated with theology.
New Testament Gateway
The New Testament Gateway is a directory of online resources on the New Testament. Mark Goodacre, an associate professor of religious studies at Duke University, is creator and editor of the site.
“The Apocryphal New Testament: A Collection of Apocryphal Christian Literature in an English Translation”
Written by James Keith Elliott (Oxford University Press, 2005). Elliott provides translations and background on recently discovered apocryphal texts.
The Official Catholic Directory
Published by P.J. Kenedy & Sons. The Official Catholic Directory is a guide to Catholic clergy in the United States and around the world.
“Butler’s Lives of the Saints”
Written by Alban Butler and Paul Burns (Liturgical Press, 1999). Butler and Burns write a revised guide to the history of the Catholic patron saints.