These are the papers on experiments at successive rounds of TREC, at Microsoft and previously at City University, using initially the Okapi system and more recently the Keenbow evaluation environment. They are all placed on this site courtesy of the National Institute of Standards and Technology, Gaithersburg, MD, and are not copyrightable in the United States. They are also available from the TREC website; individual links to the corresponding TREC website items are provided below (some of these are in .pdf.gz or .ps.gz format).
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TREC-9 Filtering and Query tracks (NIST version)
TREC-9 Question Answering (NIST version)
TREC-6 Automatic experiments (NIST version)
TREC-6 Interactive track (NIST version)
TREC-6 Chinese language track (NIST version)
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