doubt clarification
@rajeshwar, welcome to the community!
I moved your thread to the appropriate forum - UNIX SCO.
This isn't a doubt, this is a question. A doubt is when you don't believe
something, a question is when you want more information about something.
It's a common mistake, thought you'd want to know.
What version of SCO are you trying to install?
Later versions of SCO Unix have CDROM installation media.