Context: Archival descriptions of the permanent holdings of the federal government in the custody of NARA are stored in Archival Research Catalog (ARC). The archival descriptions include information on traditional paper holdings, electronic records, and artifacts. As of December 2012, the catalog consisted of about 10 billion logical data records describing 527,000 artifacts and encompassing 81% of NARA's records. There are also 922,000 digital copies of already digitized materials.

Question: Where are archival descriptions of holdings under the custody of NARA stored?
Answer: Archival Research Catalog (ARC)

Question: As of the end mid December of 2012, how many logical data records are stored at NARA?
Answer: 10 billion

Question: How many digital copies of previously digitized materials were there in December of 2012?
Answer: 922,000

Question: Archival descriptions include traditional paper holdings, electron records, and what?
Answer: artifacts

Question: The 10 billion logical data records are linked to how many artifacts?
Answer: 527,000

Question: In what year was the ARC created?
Answer: Unanswerable

Question: What is the maximum capacity of what the federal government can store ?
Answer: Unanswerable

Question: What percentage of artifacts are actually held in museums?
Answer: Unanswerable

Question: What does the government usually back up 81% of in case of damage?
Answer: Unanswerable

Question: How many catalogs sent to people each year could actually be digitized instead?
Answer: Unanswerable