Take the 2017 PBS Digital Studios Survey: surveymonkey.com/r/pbsds2017. Today we're going to talk about a fundamental part of all modern computers. The thing that basically everything else uses - the Arithmetic and Logic Unit (or the ALU). The ALU may not have to most exciting name, but it is the mathematical brain of a computer and is responsible for all the calculations your computer does! And it's actually not that complicated. So today we're going to use the binary and logic gates we learned in previous episodes to build one from scratch, and then we'll use our newly minted ALU when we construct the heart of a computer, the CPU, in episode 7. Produced in collaboration with PBS Digital Studios: youtube.com/pbsdigitalstudios The Latest from PBS Digital Studios: www.youtube.com/playlist?list... We’ve got merch! store.dftba.com/collections/crashcourse Want to know more about Carrie Anne? about.me/carrieannephilbin Want to find Crash Course elsewhere on the internet? Facebook - www.facebook.com/YouTubeCrashC... Twitter - www.twitter.com/TheCrashCourse Tumblr - thecrashcourse.tumblr.com Support Crash Course on Patreon: patreon.com/crashcourse CC Kids: www.youtube.com/crashcoursekids Want to find Crash Course elsewhere on the internet? Facebook - www.facebook.com/YouTubeCrashCourse Twitter - www.twitter.com/TheCrashCourse Tumblr - thecrashcourse.tumblr.com Support Crash Course on Patreon: patreon.com/crashcourse CC Kids: www.youtube.com/crashcoursekids

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