1. Balance Scale: Balance scale weight & distance database
2. Balloons: Data previously used in cognitive psychology experiment; 4 data sets represent different conditions of an experiment
3. Hayes-Roth: Topic: human subjects study
4. Nursery: Nursery Database was derived from a hierarchical decision model originally developed to rank applications for nursery schools.
5. Twitter Data set for Arabic Sentiment Analysis: This problem of Sentiment Analysis (SA) has been studied well on the English language but not Arabic one. Two main approaches have been devised: corpus-based and lexicon-based.