The background, operational, and procedural events leading to and included in the building of the 'Thesaurus of Engineering and Scientific Terms' are discussed. The work was performed by the Office of Naval Research, at the request of the Director, Defense Research and Engineering, under a specially established task named Project LEX. Joint working arrangements with Engineers Joint Council resulted in a single Thesaurus for both DoD and EJC. Some resulting facts and figures are reported including recommendations to the Committee on Scientific and Technical Information (COSATI) for changes in the COSATI Subject Category List. Appendixes include authorizing papers, agreements, references material, participants, and joint EJC-DoD conventions for thesaurus building. Results show collection and development of a large data bank, size, and description of the final product as well as computer support and interface to automatic typesetting equipment.

The background, operational, and procedural events leading to and included in the building of the 'Thesaurus of Engineering and Scientific Terms' are discussed. The work was performed by the Office of Naval Research, at the request of the Director, Defense Research and Engineering, under a specially established task named Project LEX. Joint working arrangements with Engineers Joint Council resulted in a single Thesaurus for both DoD and EJC. Some resulting facts and figures are reported including recommendations to the Committee on Scientific and Technical Information (COSATI) for changes in the COSATI Subject Category List. Appendixes include authorizing papers, agreements, references material, participants, and joint EJC-DoD conventions for thesaurus building. Results show collection and development of a large data bank, size, and description of the final product as well as computer support and interface to automatic typesetting equipment.