QRS II and GNE:  Latest editions of both programs require a machine running Windows 95, 98, ME, 2000,  NT 4, XP, Vista or 7.

Memory:  Windows 95-XP should have a minimum of 32 megabytes of free memory after Windows is loaded.  Additional memory may be needed depending upon the number of zones in the network.  128 megabytes is recommended for networks approaching 3600 zones.  Some OD table refinment methods for large networks can require more than 1 gigabyte of main memory.