Audible free book: http://www.audible.com/computerphile Catering for a global audience is difficult, Tom takes us through a 'timezones' style explanation of the things you need to keep in mind when internationalising your code. This video features Tom Scott - more from him at: null & https://twitter.com/tomscott The Problem with Time & Timezones: https://www.youtube.com/watch?v=-5wpm-gesOY Emoji & the Levitating Businessman: https://www.youtube.com/watch?v=tITwM5GDIAI Heartbleed, Running the Code: https://www.youtube.com/watch?v=1dOCHwf8zVQ Floating Point: https://www.youtube.com/watch?v=PZRI1IfStY0 Public Key Cryptography: https://www.youtube.com/watch?v=GSIDS_lvRv4 http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. See the full list of Brady's video projects at: http://bit.ly/bradychannels