CS50x 2026 Lectures - CS50x 2026 - Lecture 0 - Scratch

*** This is CS50, Harvard University's introduction to the intellectual enterprises of computer science and the art of programming. *** TABLE OF CONTENTS 00:00:00 - Introduction 00:02:03 - This is CS50 00:02:24 - Artificial Intelligence 00:14:12 - Computer Science 00:15:36 - Unary 00:16:06 - Binary 00:29:46 - ASCII 00:40:52 - Unicode 00:44:57 - Color 00:50:17 - Representation 00:55:23 - Algorithms 01:04:45 - Pseudocode 01:14:09 - Scratch 01:18:15 - Hello, World 01:21:21 - Hello, You 01:30:20 - Meow 01:33:51 - Abstractions 01:37:55 - Conditionals 01:40:05 - Oscartime 01:51:59 - Ivy’s Hardest Game *** HOW TO SUBSCRIBE http://www.youtube.com/subscription_center?add_user=cs50tv HOW TO TAKE CS50 edX: https://cs50.edx.org/ Harvard Extension School: https://cs50.harvard.edu/extension Harvard Summer School: https://cs50.harvard.edu/summer OpenCourseWare: https://cs50.harvard.edu/x HOW TO JOIN CS50 COMMUNITIES Bluesky: https://bsky.app/profile/cs50.harvard.edu Discord: https://discord.gg/cs50 Ed: https://cs50.edx.org/ed Facebook Group: https://www.facebook.com/groups/cs50/ Faceboook Page: https://www.facebook.com/cs50/ GitHub: https://github.com/cs50 Gitter: https://gitter.im/cs50/x Instagram: https://instagram.com/cs50 LinkedIn Group: https://www.linkedin.com/groups/7437240/ LinkedIn Page: https://www.linkedin.com/school/cs50/ Medium: https://cs50.medium.com/ Quora: https://www.quora.com/topic/CS50 Reddit: https://www.reddit.com/r/cs50/ Slack: https://cs50.edx.org/slack Snapchat: https://www.snapchat.com/add/cs50 SoundCloud: https://soundcloud.com/cs50 Stack Exchange: https://cs50.stackexchange.com/ Telegram: https://t.me/cs50x Threads: https://www.threads.net/@cs50 TikTok: https://www.tiktok.com/@cs50 Twitter: https://twitter.com/cs50 Twitter Community: https://twitter.com/i/communities/1722308663522594923 YouTube: http://www.youtube.com/cs50 HOW TO FOLLOW DAVID J. MALAN Facebook: https://www.facebook.com/dmalan GitHub: https://github.com/dmalan Instagram: https://www.instagram.com/davidjmalan/ LinkedIn: https://www.linkedin.com/in/malan/ Quora: https://www.quora.com/profile/David-J-Malan Threads: https://www.threads.net/@davidjmalan TikTok: https://www.tiktok.com/@davidjmalan Twitter: https://twitter.com/davidjmalan *** CS50 SHOP https://cs50.harvardshop.com/ *** LICENSE CC BY-NC-SA 4.0 Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International Public License https://creativecommons.org/licenses/by-nc-sa/4.0/ David J. Malan https://cs.harvard.edu/malan [email protected]