| Title | Date | Type | Setname | ||
|---|---|---|---|---|---|
| 2026 |  | Allen's Horse | 1910; 1906; 1907; 1908; 1909; 1911; 1912; 1913; 1914 | Image | dha_scp |
| 2027 |  | Allen, Dr. Samuel H., House and Carriage House | 1979-05-18 | Text | dha_unrnf |
| 2028 |  | Allen, J. R., House | 1980-08-28 | Text | dha_unrnf |
| 2029 |  | Allen, Kay | 1935 | Image/StillImage | dha_uslp |
| 2030 |  | Allen, Thomas L., House | 1982-07-23 | Text | dha_unrnf |
| 2031 |  | Allen, W. Douglas | 1937 | Image/StillImage | dha_uslp |
| 2032 |  | Allen-Warner Valley Energy System Environmental Impact Statement | 1980 | Text | uaida_main |
| 2033 |  | Alliance Coal Company | 1912-09-13 | Image | dha_scp |
| 2034 |  | Alliance Coal Company, Coal Yard | 1912-08-28 | Image | dha_scp |
| 2035 |  | Alliance Mine | Image | dha_cp | |
| 2036 |  | Allied Building Credit Booth | 1952-03-03 | Image | dha_scp |
| 2037 |  | Allied Building Credit Booth | 1952-03-03 | Image | dha_scp |
| 2038 |  | Allied Development Co. - War Surplus | 1950; 1951; 1952; 1953; 1954; 1955; 1956; 1957; 1958; 1959; 1960 | Image | mc_mcm |
| 2039 |  | Allied Development Co. - War Surplus | 1980; 1981; 1982; 1983; 1984; 1985; 1986; 1987; 1988; 1989; 1990 | Image | mc_mcm |
| 2040 |  | Allied Materials Company-Equipment P.1 | 1974-07-18 | Image | dha_cp |
| 2041 |  | Allied Materials Company-Equipment P.10 | 1974-07-18 | Image | dha_cp |
| 2042 |  | Allied Materials Company-Equipment P.11 | 1974-07-18 | Image | dha_cp |
| 2043 |  | Allied Materials Company-Equipment P.4 | 1974-07-18 | Image | dha_cp |
| 2044 |  | Allied Materials Company-Equipment P.5 | 1974-07-18 | Image | dha_cp |
| 2045 |  | Allied Materials Company-Equipment P.6 | 1974-07-18 | Image | dha_cp |
| 2046 |  | Allied Materials Company-Equipment P.7 | 1974-07-18 | Image | dha_cp |
| 2047 |  | Allied Materials Company-Equipment P.8 | 1974-07-18 | Image | dha_cp |
| 2048 |  | Allied Materials Company-Equipment P.9 | 1974-07-18 | Image | dha_cp |
| 2049 |  | Allied War Surplus | 1950; 1951; 1952; 1953; 1954; 1955; 1956; 1957; 1958; 1959; 1960 | Image | mc_mcm |
| 2050 |  | Allis Chalmers Company | 1906-08-15 | Image | dha_scp |