Computer courses that lead to professional jobs typically focus on skills in high demand within the tech industry. Here are some of the most popular and beneficial courses:

1. Computer Science (CS) Degree: Covers a broad range of topics including algorithms, data structures, software development, and systems design. A CS degree is highly regarded for many tech roles.
2. Software Engineering: Focuses on designing and building software systems. Courses in this field teach programming languages, software testing, and project management.
3. Data Science and Analytics: Includes courses on data mining, machine learning, statistical analysis, and big data technologies. Data scientists and analysts are in high demand.
4. Cybersecurity: Covers topics like network security, cryptography, risk management, and ethical hacking. Cybersecurity professionals are crucial for protecting organizational data.
5. Web Development: Teaches front-end (HTML, CSS, JavaScript) and back-end (server, database management) development. Web developers are needed to build and maintain websites and web applications.
6. Cloud Computing: Focuses on cloud infrastructure, services like AWS, Azure, and Google Cloud, and managing scalable applications. Cloud professionals are essential for modern IT infrastructure.
7. Artificial Intelligence (AI) and Machine Learning (ML): Involves learning about neural networks, natural language processing, and deep learning. AI/ML specialists are sought after in many industries.
8. Database Administration: Courses on database management systems (DBMS), SQL, and data modeling. Database administrators manage and maintain databases for organizations.
9. Networking: Focuses on network design, implementation, and maintenance. Network engineers ensure robust and secure communication within an organization.
10. DevOps: Combines software development (Dev) and IT operations (Ops). Courses teach continuous integration, delivery, and deployment practices.
11. Mobile App Development: Covers developing applications for mobile platforms (iOS and Android) using languages like Swift, Kotlin, and Java. Mobile developers create apps for smartphones and tablets.
12. UX/UI Design: Focuses on user experience and user interface design, including usability testing and interaction design. UX/UI designers enhance the usability and aesthetics of digital products.

These courses can be pursued through traditional university degrees, online platforms like Coursera, edX, and Udacity, or specialized bootcamps. The key is to choose a course that aligns with your interests and career goals while also considering the job market demand.