CS50

What was your favorite lecture from CS50 for Business? Comment below. 👇 The entire course is available on YouTube for free at cs50.ly/business. To take this course for a certificate, register at cs50.edx.org/business.

This Friday, April 3, join CS50 for a Tech Talk on why you’re still better than AI at editing documents, led by Nick Bernal of SuperDoc.dev, starting at 1pm EDT. Register for Zoom at cs50.zoom.us/meeting/regist….

Have you started CS50 for Business yet? This newest course from CS50 covers a broad range of topics, from algorithms and data structures to artificial intelligence (AI), perfect for decision-makers of today and tomorrow. The entire course is available on YouTube for free at cs50.ly/business. To take this course for a certificate, register at cs50.edx.org/business.

Can you solve ‘BananAnagrams’ from last year’s CS50x Puzzle Day? For an interactive spreadsheet version of the puzzle, visit tinyurl.com/banananagrams. See cs50.ly/puzzle-day-2025 for the solution. Register for this year’s Puzzle Day at cs50.ly/register.

Can you solve ‘Books’ from CS50x Puzzle Day 2024? See cs50.ly/puzzle-day-2024 for the solution. Register for this year’s Puzzle Day at cs50.ly/register.

Can you solve ‘Around the World’ from last year’s Puzzle Day? See cs50.ly/puzzle-day-2025 for the solution. Register for this year’s Puzzle Day at cs50.ly/register.

This is Lecture 8 (the last!) of CS50 for Business on Securing Systems. Learn how to secure systems with strong passwords, encryption, two-factor authentication, and best practices to protect your data from cyber threats and hackers. To take this course for a certificate, register at cs50.edx.org/business. youtu.be/9KoYnFuHYL8

This is Lecture 7 of CS50 for Business on Deploying Databases. Learn how to deploy and manage databases at scale with SQL and noSQL, including best practices for efficient data storage and querying. To take this course for a certificate, register at cs50.edx.org/business. youtu.be/OZE2t3-M0ps

This is Lecture 6 of CS50 for Business on Weaving the Web. Learn the fundamentals of web development with HTML, CSS, and JavaScript, languages with which you (or someone else!) can build modern, interactive websites. To take this course for a certificate, register at cs50.edx.org/business. youtu.be/O3jwILfJXkY

This is Lecture 5 of CS50 for Business on Implementing the Internet. Explore how the internet works from the ground up, including protocols like IP, TCP, DNS, and HTTP, plus modern scaling with cloud computing and virtualization. To take this course for a certificate, register at cs50.edx.org/business. youtu.be/pjDtNVZXRHo

This is Lecture 4 of CS50 for Business on Approaching Artificial Intelligence. Explore the fundamentals of artificial intelligence, including game playing algorithms, reinforcement learning, neural networks, and natural language processing. To take this course for a certificate, register at cs50.edx.org/business. youtu.be/pFq5szYIWQk

This is Lecture 3 of CS50 for Business on Practicing Programming. Learn fundamentals of Python programming with practical examples of functions, conditionals, loops, data types, libraries, and real-world applications. To take this course for a certificate, register at cs50.edx.org/business. youtu.be/_UE0BW-2dYk

This is Lecture 2 of CS50 for Business on Designing Data Structures. Explore the essentials of data structures, such as arrays, linked lists, trees, and hash tables, and understand their trade-offs for efficient memory use and algorithm performance. To take this course for a certificate, register at cs50.edx.org/business. youtu.be/-kKf1U6KuGk

This is Lecture 1 (the second!) of CS50 for Business on Analyzing Algorithms. Learn how to analyze and optimize algorithms for searching and sorting with in-depth explanations of time complexities and practical examples. To take this course for a certificate, register at cs50.edx.org/business. youtu.be/fFzWME39Mag

This is Lecture 0 (the very first!) of @CS50 for Business, in which you'll learn all about Interpreting Information. Discover the fundamentals of computer science, from binary data to algorithms, and learn how technology processes information to solve real-world problems efficiently. To take this course for a certificate, register at cs50.edx.org/business. youtu.be/pWPHa4FL264

CS50 is back with a new-and-improved course, Computer Science for Business! This 9-lecture series is designed specifically for business professionals, managers, founders, and decision-makers. Tune in every day on @CS50’s YouTube at 9:00 am ET starting tomorrow. To take this course for a certificate, register at cs50.edx.org/business. And for now — a word of introduction from Professor @davidjmalan. youtu.be/tT9VMlXRkwE

Have you registered for CS50x Puzzle Day 2026 yet? It starts anytime after 00:00 on Friday, April 3, and ends anytime before 23:59 on Monday, April 6, in your own time zone. Register at cs50.ly/register. Learn more about Puzzle Day from Professor @davidjmalan. 👇

Hello, world! CS50x Puzzle Day starts anytime after 00:00 on Friday, April 3, and ends anytime before 23:59 on Monday, April 6, in your own time zone. Register at cs50.ly/register. CS50x Puzzle Day is an online adaptation of an event we hold at Harvard each year, an opportunity to collaborate on a team with classmates, family, friends, students, and colleagues on a packet of puzzles (i.e., logic problems). The event is open to everyone around the world, whether taking CS50 or not. No prior CS experience required. Teams of size 2, 3, or 4 are encouraged, or you can participate on your own. Teachers are welcome to host their own version during class. See cs50.ly/puzzle-day-2025 for a summary of last year’s CS50x Puzzle Day as well as some past puzzles for practice. Indeed, the best way to practice for this year is to solve past puzzles first!

"In this episode, we explore Professor @davidjmalan's journey into computer science, why discovering a subject later can be a strength, and how curiosity often matters more than credentials. We talk openly about imposter syndrome, the role of struggle in real learning, and what education should protect in an age of AI. Along the way, Prof. Malan reflects on the power of computer science to turn people from consumers into creators, and the responsibility educators have as technology continues to evolve." With Yash Shah of @imperialcollege. youtube.com/watch?v=EgEL3d…