(WP 12/04 Clave pdf) Enterprise systems (ES) can be considered as a novel phenomenon for the information system research and other academic fields (e.g. operations and supply chain), which has opened an immense potential and opportunities for research. Although the interest of the scholars on ES is recent, the number of publications is continuously growing since 2000. The aim of this paper is to review a sample of important contributions of the ES works published to date. To do this, the selected works have been classified in four key topics: business implications, technical issues, managerial issues, and implementation issues.