The Scientific Working Group on Digital Evidence.

The Scientific Working Group on Digital Evidence (SWGDE) brings together organizations actively engaged in the field of digital and multimedia evidence to foster communication and cooperation as well as ensuring quality and consistency within the forensic community.
SWGDE is focused on the practice of digital evidence forensics primarily in the laboratory setting. However, we have endeavored to adopt documents that will be useful to agencies that perform these tasks in a non-traditional forensic laboratory or the field. Some of SWGDE’s earliest work explored the principles of digital forensics and developed some baseline definitions.

Link: http://www.swgde.org/