I have seven different groups / lists and I'm trying to find the best way to pull one option from each list in order and get every permutation.

Example:

Sever Operating System:
None Installed
Windows 2008

Sever Memory:
None Installed
2GB
4GB

Hard Drive Bay 1:
No Hard Drive
72GB
300GB
500GB

There are 7 groups and each group has a different amount of items. Not sure the best way to quickly generate all the permutations in excel.