These files are interpretation programs developed by Interpex of Golden Colorado. These versions are for demonstration only and do not have all the functions of the files you puchuse. (The real versions cost several thousand dollars each!). You can get more info and other demo programs, including seismic and potential fields from the web site http://www.csn.net/interpex/index.html To install the porgrams copy the file ????.zip to a pc, enter unzip ????.zip. resix-resitivitiy program temix- Transient EM program aqua-aquifer test programs