ExplainingComputers uploads weekly computing videos. It is produced by Christopher Barnatt, who spent 25 years teaching computing and future studies in the University of Nottingham, and who is the author of thirteen books including "Digital Genesis: The Future of Computing, Robots and AI", "3D Printing: Third Edition" and "The Next Big Thing". Please note that the e-mail address below really is for business enquiries only. If you want to contact me on another matter, please do so via a video comment. Due to the volume of communications I receive, I cannot offer a free technical support service via e-mail.