If the Software is intended for network use, Hot Door grants the Customer the right to install and use the Software on a single file server for use on a single local area network for either (a) permanent installation on a storage device of up to the permitted number of computers OR (b) use of the Software over this network if the number of computers on which the Software is used does not exceed the permitted number of computers. When using both Mac OS and Windows on the same or different machines, each operating system is considered, and is counted as, a separate computer. Each Software license purchased permits use on only one computer, excluding a secondary portable or home computer, that is not used at the same time as the primary computer. From the CADtools license agreement: Hot Door grants to Customer the right to install the Software on a storage device of up to the permitted number of computers that matches the number of Software licenses that Customer purchased.