Nataraj,

> Please suggest me the best enviroment to develop a good system. I prefer to do it in Linux.
> Is there a need to go for a OO enviroment like Delphi? Or would an API interface of IB suffice?

Another option would be java, then you can develop on Linux. But if you
don't know java there is probably too long a learning curve.

Python would be another cross platform and very rapid development tool.

Both have the advantages of zero development and deployment license costs.

Both can connect to Firebird.

Dave