The document summarizes an experiment using the SMART information retrieval system from 1964. The SMART system took documents and queries in English, analyzed the texts, matched queries to documents, and retrieved the most similar items. The experiment used a collection of 1268 library science abstracts to test the SMART system's retrieval effectiveness under different relevance judgments from query authors and outside experts. The results showed that comparing ranking of recall-precision curves was better than comparing individual recall and precision values to evaluate different processing methods.