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[eluser]CroNiX[/eluser]
It's a pretty easy case to make.

"We can use this efficient library and it will work for all we need to do without having to have requirements for each computer accessing the system, or else we need to make sure each of these applications is installed and up to date on each computer accessing the system which will require a lot more work and ongoing IT updates and end-user support."

You just have to present it logically as it will make the work easier which they will hear as "it's cheaper and will work better"