Hello Everybody

Iam involved in preparation of online catalogue of books in accessible format for visually impaired candidates such as braille or audio books.For this we have created a website on which all the centers (which are members of our organisation, an NGO iam working with as volunteer) producing such books all over the india would upload their catalogue.On this website I want to give the list of subjects so that while uploading catalogue detail of a book subject could be selected from this list. Iam confused what subjects should be given.

Kindly suggest list of subjects which could be followed