Data Clustering - a technique for data analysis by partitioning a data set into subsets whose elements share common traits.
In Demographics , the gathering of various populations based on ethnicity, economics or religion.
In Writing , a "pre-writing" technique to organize ideas using "ball-and-stick" diagrams similar to Mind Map s. The term was popularized by Gabriele Rico's 1983 book ''Writing the Natural Way: Turn the Task of Writing Into the Joy of Writing.''
