In 1965, Horty's pioneering work inspired the Ohio State Bar Association (OSBA) to develop its own separate CALR system, Ohio Bar Automated Research (OBAR). In 1967, the OSBA signed a contract with Data Corporation, a local defense contractor, to build OBAR based on the OSBA's written specifications. Data proceeded to implement OBAR on Data Central, an interactive full-text search system originally developed in 1964 as Recon Central to help U.S. Air Force intelligence analysts search text summaries of the contents of aerial and satellite reconnaissance photographs. (Before computer vision was invented, text summaries were manually prepared by enlisted personnel called "photo interpreters"; analysts then used those summaries as a catalog to retrieve photographs from which they could draw inferences about enemy strategy.