Stephen. E. Robertson

1946

• B C, Before Computers
• A front-end for IR experiments
• A theoretical model of the retrieval characteristics of information retrieval systems
• An operational evaluation of weighting, ranking, and relevance feedback, via a front-end system
• Development of IR evaluation methods
• Final report on international research forum in information science
• Five specialised information centres
• Okapi at TREC
• Statistical problems in the application of probabilistic models to information retrieval