Theoretical computer science courses can help you learn algorithms, computational complexity, automata theory, and formal languages. You can build skills in problem-solving, mathematical reasoning, and algorithm analysis, that support tackling complex computational tasks. Many courses introduce tools like Python for algorithm implementation, LaTeX for typesetting mathematical documents, and software for simulating automata, allowing you to apply these concepts in practical scenarios.

University of California, Davis
Skills you'll gain: jQuery, Javascript and jQuery, UI Components, Scripting, JavaScript Frameworks, Cascading Style Sheets (CSS), HTML and CSS, Javascript, Hypertext Markup Language (HTML), Frontend Performance, Animations, Event-Driven Programming
★ 4.8 (128) · Beginner · Course · 1 - 4 Weeks

Codio
Skills you'll gain: Algorithms, Data Structures, Java, Java Programming, Other Programming Languages
★ 3.6 (10) · Intermediate · Course · 1 - 4 Weeks

Johns Hopkins University
Skills you'll gain: Social Network Analysis, Network Analysis, Graph Theory, R (Software), Social Sciences, Statistical Analysis, R Programming, Statistical Software, Sociology, Network Model, Statistical Modeling, Statistical Hypothesis Testing, Statistical Methods, Dependency Analysis
★ 4.3 (13) · Intermediate · Course · 1 - 4 Weeks

Berklee
Skills you'll gain: Post-Production, Music, Musical Composition, Peer Review, Media Production, Music Performance, Instrumental Music, Automation, Editing, File Management, Collaborative Software, Digital Signal Processing, Writing, Timelines, Coordination, Data Import/Export, Computer Hardware, Electronic Media
★ 4.8 (3.1K) · Beginner · Specialization · 3 - 6 Months

Infosec
Skills you'll gain: Open Web Application Security Project (OWASP), Secure Coding, Exploitation techniques, Application Security, Vulnerability Assessments, Extensible Markup Language (XML), Threat Detection
★ 4.8 (23) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Natural Language Processing, Microsoft Azure, Computer Vision, No-Code Development, Applied Machine Learning, Artificial Intelligence and Machine Learning (AI/ML), Machine Learning, Predictive Modeling, Artificial Intelligence, AI literacy, Responsible AI
★ 4.7 (233) · Beginner · Course · 1 - 4 Weeks
Skills you'll gain: Dashboard, Business Intelligence, Business Intelligence Software, Dashboard Creation, Tableau Software, Interactive Data Visualization, Business Reporting, Data Storytelling, Data Presentation, Data Visualization Software, Data Visualization, Stakeholder Communications, Performance Tuning, Interviewing Skills, Presentations, Performance Improvement, Performance Analysis
★ 4.8 (1.4K) · Advanced · Course · 1 - 3 Months
Duke University
Skills you'll gain: Materials science, Prototyping, Engineering, Scientific, and Technical Instruments, Analytical Chemistry, Semiconductors, Analytical Testing, Laboratory Techniques, Chemistry, Manufacturing Processes, Laboratory Equipment, Laboratory Procedures, Process Engineering, Personal protective equipment
★ 4.8 (3.1K) · Mixed · Course · 1 - 3 Months

University of Michigan
Skills you'll gain: Data Structures, Python Programming, Computer Programming, Data Visualization, Computational Thinking, Debugging
★ 4 (7) · Beginner · Course · 1 - 4 Weeks
Skills you'll gain: Medical Terminology, Revenue Cycle Management, Medical Billing, Medical Billing and Coding, Resilience, Electronic Medical Record System, Emotional Intelligence, Anatomy, Pathology, Medical Coding, Professionalism, Diversity Awareness, Patient-centered Care, Medical History Documentation, Composure, Empathy & Emotional Intelligence, ICD Coding (ICD-9/ICD-10), Medical Records, Physiology, Payment Processing
★ 4.7 (1.8K) · Beginner · Specialization · 3 - 6 Months

Skills you'll gain: React Native, Mobile Development, iOS Development, Apple iOS, Android Development, Mobile Development Tools, UI Components, Cross Platform Development, React Redux, Application Development, React.js, Application Frameworks, Development Environment, Debugging, Context Management, Software Development, Data Persistence, Command-Line Interface, Data Validation
★ 4.9 (24) · Intermediate · Course · 1 - 3 Months

Microsoft
Skills you'll gain: CI/CD, Azure DevOps, Continuous Integration, Cloud Deployment, Application Deployment, Microsoft Azure, Azure DevOps Pipelines, Cloud Services, Continuous Deployment, DevOps, Cloud Applications, Cloud Security, Microsoft Development Tools, Application Performance Management, Microsoft Copilot, Cloud Management, Capacity Management, System Monitoring, Debugging
★ 4.3 (26) · Beginner · Course · 1 - 3 Months