The Common Source. Dive into Extreme Data Management The Common Source, LP is a diamond-level litigation support and document management service provider specializing in electronic data discovery, secure on-line repository, contract attorney document review, litigation software sales and training, document scanning, coding, computer forensics, blowbacks, coding, electronic discovery, ediscovery, EDD, and electronic data discovery. Online-commonsource.com~Site InfoWhoisTrace RouteRBL Check