File decompression software, such as Winzip® or StuffIt®, is required to open the .zip files found on this course site. Microsoft® Excel software is recommended for viewing the .xls files found on this course site. Free Microsoft® Excel viewer software can also be used to view the .xls files. Microsoft® Powerpoint software is recommended for viewing the .ppt files found on this course site. Free Microsoft® Powerpoint viewer software can also be used to view the .ppt files. Any number of software tools can be used to run the .dat files found on this course site. Any number of programs can be used to run the .dat, .mod, .prj, .txt, and .osc files found on this course site. Please refer to the course materials for any specific instructions or recommendations.