Secondary Key Retrieval Using an IBM 7090-1301 System The secondary key retrieval method involves the preparation of secondary storage lists from primary data records. Search requests are satisfied by logical operations on appropriate lists, producing a complete set of addresses of primary records relevant to the request. Experimental results are presented and a comparative analysis is given. CACM April, 1965 Davis, D. R. Lin, A. D. CA650420 JB March 7, 1978 3:18 PM 1271 4 1271 1785 4 1271 2543 4 1271 2552 4 1271 911 4 1271 1271 5 1271 1271 5 1271 1271 5 1271 1976 5 1271 332 5 1271 1271 6 1271