Hi Komal,
The CRIS (Centre for Railway Information Systems) is responsible for managing railway reservations. I had the opportunity of visiting their office in Delhi last year and I must say that they have some extremely talented programmers. At that time, they were in the process of testing Linux Thin terminals and I was working for a company that sold them a couple of pieces for testing purposes. Their application is written in C++ and it has been ported to Linux - compiles perfectly, is fast and very stable. They were planning to shift all reservation terminals to Linux in a phased manner.
C++ for database programming!!! Very interesting. Any link on that?
Komal