8.1.5 PIII 500+ 256M+ 12G harddisk NT,Less 10 connections,6 Instance
8.0.5 PIII 500+ 256M+ 12G harddisk Linux,Less 10 connections,2 Instance
AIX oracle server(I don't know the configuration)
Solaris Oracle server(I don't know the configuration)
.......
They are all develop servers. I think the servers may be enough.