David T. Cliff FRSA FIMA FBCS CITP (born 1966) is a Professor in the Department of Computer Science at the University of Bristol and was formerly the Director of the UK Large-scale Complex IT Systems (LSCITS) Initiative. Cliff is the inventor of the seminal ZIP trading algorithm, one of the first of the current generation of autonomous adaptive algorithmic trading systems, which was demonstrated to outperform human traders in research published in 2001 by IBM. He is also the inventor on multiple international patentsfrom the early 2000s concerning his invention hpDJ, the world's first fully automated disk-jockey (DJ) system for electronic dance music, the precursor to present-day DJ automation tools such as Traktor.