This is Fall 2026 of CS50 (aka CSCI E-50) at Harvard Extension School. Looking for Summer 2026 or Spring 2026?

This is CS50

Harvard Extension School
Fall 2026

  • 🧩 CS50 Puzzle Day
  • Canvas
  • CS50.ai
  • Ed Discussion
  • Gradescope
  • Visual Studio Code
  • CS50 Shop
  • CS50.courses
  • Scratch
  • Announcements
  • FAQs
  • Final Project
  • Office Hours
  • Problem Sets
  • Sections
  • Staff
  • Syllabus
  • CS50 Manual Pages
  • CS50 Status Page
  • Recommended Settings for Zoom