Context: NARA's holdings are classed into "record groups" reflecting the governmental department or agency from which they originated. Records include paper documents, microfilm, still pictures, motion pictures, and electronic media.

Question: What types of groups are NARA's holdings classified into?
Answer: record groups

Question: Each record group is classified based on what?
Answer: governmental department or agency

Question: Besides films and other non-static media, what type of media is classified into a group?
Answer: documents

Question: Besides the general media and motion picture categories, which category contains media that is not static?
Answer: microfilm

Question: What are governmental departments usually classed into?
Answer: Unanswerable

Question: How is NARA classified as officially?
Answer: Unanswerable

Question: What record types were used more in the past than they are now?
Answer: Unanswerable

Question: What records are usually used currently because they are the most efficient?
Answer: Unanswerable

Question: What record is the oldest type in storage?
Answer: Unanswerable