Codex Sinaiticus - Image via Wikipedia
When the manuscript was written in the middle of the fourth century there was wide but not complete agreement on which books should be considered authoritative, according to the web site where the Codex is posted.
The Codex includes some apocryphal books such as 2 Esdras, Tobit and Judith in the Old Testament. The New Testament portion includes the Epistle of Barnabas and the Shepherd of Hermas.
Here is the website where the Codex will be posted:
http://www.codexsinaiticus.org/en/