CS50: Computer Science Courses and Programs from Harvard

What is a CS50 program?

Computer Science 50, or CS50, is an introductory computer science program created by Harvard University.

Course offerings

HarvardX's courses and professional certificate programs on edX include:

• Introduction to Computer Science
• Introduction to Programming with Python
• Computer Science for Artificial Intelligence
• Mobile App Development with React Native

Duration and flexibility

Course durations range from 5-12 weeks, while professional certificate programs average 5-6 months. However, these courses are self-paced, so your timeline may differ depending on your study schedule.

Costs and access

Learners can audit any HarvardX CS50 course on edX for free. The cost of a certificate ranges from $219 to $299. Professional certificate programs cost between $376 and $519. High school students can earn AP credit with HarvardX's CS50 AP Computer Science Principles XSeries program for $466.20. Prices may vary based on available discounts.

Top CS50 courses

Start with CS50x

Complete your program certificate with one of these courses

Why take a CS50 course?

You don't need prior experience to get started with HarvardX CS50 — in fact, the program is designed for students of all levels. Regardless of your prior computer science knowledge, CS50 courses can help you gain a solid grasp of computer science essentials, including popular programming languages, algorithms, and data structures.

Practical learning

Introduction to Computer Science (CS50x), the typical entry point for most learners, covers the fundamentals using real-world examples, such as gaming and finance, for practice problem sets.

Course variety

Learners can also take courses in specific programming languages, including Python, JavaScript, R and RStudio, and Scratch. CS50 also includes courses in mobile app development, cybersecurity, and understanding computer science applications within business (CS50B) and law (CS50L).

Career development

These courses emphasize computational thinking, a widely applicable skill that improves methodical decision-making. For those interested in pursuing a career in computer science — whether as a data scientist, analyst, programmer, or software engineer — CS50 courses provide a sturdy foundation for further study.

Note: Some courses are only offered annually or quarterly, so be sure to check program availability prior to enrolling.

Online computer science curriculum

HarvardX CS50 courses cover the essentials of computer science, such as programming languages and mobile app development. Topics, theories, and skills you can learn include:

• Abstraction
• Algorithms
• Application programming interfaces (APIs)
• Artificial intelligence (AI)
• Cascading Style Sheets (CSS)
• Cloud computing and services
• Computer science
• Computational thinking
• Cryptography
• Database design
• Data structures
• Django (web framework)
• Forensic sciences
• GitHub
• HyperText Markup Language (HTML)
• Web development

Programming languages include:

• C
• JavaScript
• Python
• R
• SQL

Additional topics for CS50 students

• Data science
• Resource management
• Scalability
• Cybersecurity
• Algorithmic thinking

Jobs for computer science graduates

The median annual wage for computer and information technology professionals in 2023 was $104,420, according to the Bureau of Labor Statistics (BLS). Below, you'll find a list of popular jobs for computer science graduates alongside BLS education requirements, 2023 salary information, and job growth projections.