1. he has been one of the founding fathers of our space programme (SLV- satellite launch vehicle). today India is one of the select few (8 or 9) countries that have indigenously develpoed and launched satellites. We watch T.V get weather reports etc. all due to satellites.
2. he has done critical work in building our defence through the missiles programme.
3, Has been the National security adviser
4. Above all, served as President of the Nation.
5. continues to tour the nation and understands the problems faced by the people. Most politicians dont even tour their own constituency even during timkes of crisis.