el salamo 3alekom

please can anyone tell me how to calculate the best hardware resources that will be
suitable with the oracle application R12 release ,because i want to buy a new servers
for my company.

this include
1- the hard disk size
2- the processor
3-RAM
4-other hardware required

the users number is about 100 user

we 3aleekom al salam wa ra7mat Allah wa barakatoh
kindly check the foloowing site:
http://www.sizinglounge.com/
this will help you in your calculations
Thanks