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Here's an overview of the software courses offered by IITs, from 12th standard to post-graduation:

After 12th:

1. JEE Advanced: Clear the Joint Entrance Examination (JEE) Advanced to secure admission to IITs.

2. B.Tech in Computer Science and Engineering (CSE): A 4-year undergraduate program.

3. B.Tech in Information Technology (IT): A 4-year undergraduate program.

After B.Tech:

1. M.Tech in Computer Science and Engineering (CSE): A 2-year postgraduate program.

2. M.Tech in Information Technology (IT): A 2-year postgraduate program.

3. MS in Computer Science and Engineering (CSE): A 2-year postgraduate program.

4. Ph.D. in Computer Science and Engineering (CSE): A 3-4 year doctoral program.

Software courses offered by IITs:

1. Computer Science and Engineering (CSE)

2. Information Technology (IT)

3. Artificial Intelligence (AI)

4. Machine Learning (ML)

5. Data Science

6. Cybersecurity

7. Software Engineering

Admission Process:

1. JEE Advanced for B.Tech

2. GATE for M.Tech

3. Entrance exams like CEED, UGC-NET, or IIT-Madras's entrance exam for MS/Ph.D.

Note: The specific courses and admission processes may vary across IITs. It's essential to check the individual IIT websites for the most up-to-date information.