Colorado Revised Statutes Title 24. Government State § 24-80-101. Definitions

(a) Materials that are not made or received by any governmental agency in pursuance of law or in connection with the transaction of public business but that are preserved or appropriate for preservation because of the value of the data contained therein or because of the historical value of the materials themselves;

(b) Library books, pamphlets, newspapers, or museum material made, acquired, or preserved for reference, historical, or exhibition purposes;

(c) Private papers, manuscripts, letters, diaries, pictures, biographies, books, and maps, including materials and collections previously owned by persons who are not associated with a governmental agency and that are transferred by the previous owners to the state historical society;

(d) Extra copies of publications or duplicated documents preserved for convenience of reference;

(e) Stocks of publications; and

(f) Electronic mail messages, regardless of whether such messages are produced or stored using state-owned equipment or software, unless the recipient has previously segregated and stored such messages as evidence of the organization, functions, policies, decisions, procedures, operations, or other activities of the government or because of the value of the official governmental data contained therein.