DeLorme Topo USA is a mapping Software. It is a 3-D application but has cons on instructions, quality of maps and user interface. This software allows you to amazingly explore the US' six million roads and 300,000 miles of trails in 2-D or 3-D with side by side split screen viewing, preview forests, wetlands, glaciers, rock cover and urban areas, or draw objects, or click an road or trail of your choice. The software is a complete product which has CD-ROM media format, with the following Microsoft Windows OS: 2000, 95, 98, ME, NT 4.0 and XP. The application recommends Processor with 300 MHz Speed / requires Intel Pentium II Processor Class 233 MHZ Speed or 233 MHz Speed Processor. The OS should be Microsoft Windows 2000 / 95 / 98 / ME, NT 4.0 or XP and has 64 MB memory and 300 MB Disk Space. With regards to its frequency band, it is not suitable for requiring precised measurement of direction or distance, or automatic navigation and guidance systems.