Jean Aitchison begins her interview by discussing how she first became involved in thesaurus development. She continues by sharing her first meeting with Shiyali Ramamrita Ranganathan and her initial impressions of him. Aitchison worked to complete three editions of English Electric Faceted Subject Classification for Engineering, between 1958 and 1961. With the help of others, she developed and reclassified many projects. She worked with Cyril Cleverdon on several publications and in March 1967 she began work on Thesaurofacet. She also worked to develop and improve the Bliss Association Classification system. Joint Interview with Thomas M. Aitchison. Thomas M. Aitchison begins his interview by detailing his educational background and then continues by discussing how he first became interested in the field of information science. With the start of his career at Courtaulds, Aitchison got his first taste of working in a library. However, it was with the completion of the Library Association correspondence course that Aitchison gained the confidence and knowledge necessary to become a successful librarian. After applying and being hired for a divisional librarian and information officer with the British Aircraft Corporation, Aitchison became a member of the Aslib aircraft information group. He also joined the National Electronics Research Council and helped the Council develop a journal and numerous other projects. In January 1967, Aitchison helped form the Information Service in Physics, Electrotechnology, and Control [INSPEC] and became the information research manager. He also worked to mechanize Science Abstracts and organize the Direct Evaluation of Indexing Languages [DEVIL] project. He concludes his interview by sharing recollections of those who had the most influence on his career.