In the 21st century, some essential courses to consider studying are:
1. Data Science and Analytics: To harness the power of data for insights and decision-making.
2. Artificial Intelligence and Machine Learning: To understand and develop AI-driven technologies.
3. Cybersecurity: To protect against the growing threat of cyberattacks and safeguard digital assets.
4. Sustainability and Environmental Studies: To address environmental challenges and promote sustainable practices.
5. Digital Marketing: To leverage online platforms and reach a wider audience.
6. Healthcare and Biotechnology: To contribute to advancements in medical research and healthcare innovations.
7. UX/UI Design: To create user-friendly and engaging digital experiences.
8. Entrepreneurship and Innovation: To foster creativity and navigate the business landscape.
9. Renewable Energy: To explore cleaner and sustainable energy solutions.
10. Cultural Studies and Diversity: To promote understanding and inclusivity in a globalized world.
Remember that the choice of courses should align with your interests and career goals.