"Fan belts only exist, briefly, in the intervals between stars Reviewing the informative Turing?s Cathedral Programming the ENIAC, the world's first digital computer (US Army photo) Book review It's a full four years since it was published, but Reg contributor Geoffrey G Rochat has finally gotten around to reading George Dyson's worthy tome Turing?s Cathedral. He finds it's not just a Best Book list lurker, but something actually worth reading." http://www.theregister.co.uk/2016/01/10/turing_cathedral_fan_belts_exist_br… Contains some discussion of level-based versus pulse-based logic in early valve computers which is frankly way over my head but might be of interest to some here. -- Liam Proven ? Profile: http://lproven.livejournal.com/profile Email: lproven at cix.co.uk ? GMail/G+/Twitter/Flickr/Facebook: lproven MSN: lproven at hotmail.com ? Skype/AIM/Yahoo/LinkedIn: liamproven Cell/Mobiles: +44 7939-087884 (UK) ? +420 702 829 053 (?R)