1. Anonymous Microsoft Web Data: Log of anonymous users of www.microsoft.com; predict areas of the web site a user visited based on data on other areas the user visited. 2. Audiology (Original): Nominal audiology dataset from Baylor 3. Audiology (Standardized): Standardized version of the original audiology database 4. Balance Scale: Balance scale weight & distance database 5. Balloons: Data previously used in cognitive psychology experiment; 4 data sets represent different conditions of an experiment 6. Breast Cancer: Breast Cancer Data (Restricted Access) 7. Car Evaluation: Derived from simple hierarchical decision model, this database may be useful for testing constructive induction and structure discovery methods. 8. Chess (King-Rook vs. King-Pawn): King+Rook versus King+Pawn on a7 (usually abbreviated KRKPA7). 9. Hayes-Roth: Topic: human subjects study 10. Lenses: Database for fitting contact lenses 11. Lymphography: This lymphography domain was obtained from the University Medical Centre, Institute of Oncology, Ljubljana, Yugoslavia. (Restricted access) 12. MONK's Problems: A set of three artificial domains over the same attribute space; Used to test a wide range of induction algorithms 13. Mushroom: From Audobon Society Field Guide; mushrooms described in terms of physical characteristics; classification: poisonous or edible 14. Nursery: Nursery Database was derived from a hierarchical decision model originally developed to rank applications for nursery schools. 15. Primary Tumor: From Ljubljana Oncology Institute 16. Shuttle Landing Control: Tiny database; all nominal values 17. Solar Flare: Each class attribute counts the number of solar flares of a certain class that occur in a 24 hour period 18. Soybean (Large): Michalski's famous soybean disease database 19. Soybean (Small): Michalski's famous soybean disease database 20. SPECT Heart: Data on cardiac Single Proton Emission Computed Tomography (SPECT) images. Each patient classified into two categories: normal and abnormal. 21. Tic-Tac-Toe Endgame: Binary classification task on possible configurations of tic-tac-toe game 22. Trains: 2 data formats (structured, one-instance-per-line) 23. Congressional Voting Records: 1984 United Stated Congressional Voting Records; Classify as Republican or Democrat 24. US Census Data (1990): The USCensus1990raw data set contains a one percent sample of the Public Use Microdata Samples (PUMS) person records drawn from the full 1990 census sample. 25. Connectionist Bench (Nettalk Corpus): The file "nettalk.data" contains a list of 20,008 English words, along with a phonetic transcription for each word. The task is to train a network to produce the proper phonemes 26. Plants: Data has been extracted from the USDA plants database. It contains all plants (species and genera) in the database and the states of USA and Canada where they occur. 27. LED Display Domain: From Classification and Regression Trees book; We provide here 2 C programs for generating sample databases 28. Connect-4: Contains connect-4 positions 29. Syskill and Webert Web Page Ratings: This database contains HTML source of web pages plus the ratings of a single user on these web pages. Web pages are on four seperate subjects (Bands- recording artists; Goats; Sheep; and BioMedical) 30. Kinship: Relational dataset 31. Molecular Biology (Protein Secondary Structure): From CMU connectionist bench repository; Classifies secondary structure of certain globular proteins 32. MSNBC.com Anonymous Web Data: This data describes the page visits of users who visited msnbc.com on September 28, 1999. Visits are recorded at the level of URL category (see description) and are recorded in time order. 33. Molecular Biology (Promoter Gene Sequences): E. Coli promoter gene sequences (DNA) with partial domain theory 34. Molecular Biology (Splice-junction Gene Sequences): Primate splice-junction gene sequences (DNA) with associated imperfect domain theory 35. Reuters-21578 Text Categorization Collection: This is a collection of documents that appeared on Reuters newswire in 1987. The documents were assembled and indexed with categories. 36. Entree Chicago Recommendation Data: This data contains a record of user interactions with the Entree Chicago restaurant recommendation system. | 
