SOL is a short form for the School of Open Learning at Delhi University. It offers admission in different UG and PG courses offered by the DU colleges. The major difference between DU and SOL is that you don’t have to attend regular college. 

Here are the other differences between DU and SOL. 

• SOL provides admission in correspondence courses and you don’t actually have to attend the classes regularly.
• Whereas in regular colleges of DU, you will have to maintain a certain percentage of attendance in order to take the internal/external exams, and hence you have to attend the colleges on a regular basis.
• SOL is one of the best options for those who couldn’t take admission in any colleges or are dropouts or working people. Also, those who are preparing for the government exams and for a safe side want a professional degree as a backup.
• In SOL, attendance does not matter much and you can easily take the examination which is held once a year without any problem. 
• Finishing a degree can be quite effortless since the classes are usually held on weekends and holidays. 
• SOL also provides study materials to its students. The questions asked on the term-end examination are mostly from the study materials provided by the institute. 

If you are interested in SOL then you can go ahead and take admission in it; if you are working or due to other reasons you are not able to pursue your PG in a regular manner. For this, the SOL assists you with study material as well.