The ECCO e-Guide is an expanding collection of algorithms based on the ECCO guidelines. These algorithms were developed during 2013-2017 by Dr. Marcus Harbord and Sociable Data, with assistance from many ECCO members, and ECCO committees particularly GuiCom and EduCom. The content is based on the most recent published ECCO guidelines (statements from prior or supportive guidelines are annotated by date and name respectively) and has been ratified by ECCO. All statements from the UC and CD algorithms are incorporated, along with selected statements from the other published guidelines. The content will be updated in conjunction with publication of new ECCO statements, new guidelines and guideline updates.