setting up a network

Hi all

I am planning to set up a n/w at my work place.I need some suggestions as to how much the RAM, hard drive capacity should be, and the no of processors for a server that would be used by 10 users.
The users will be running simulation models written in java,c++,vb..and GIS(Geographic Information systems)...Do u think 1 dual processor server would be fine or do i need 2 servers...
thanks
sandhya