The statistical operations and modules in Survo are able to handle data sets either saved in special data files or located in the edit field. The data in the edit field can be easily saved in edit files. To change information with other systems producing data sets or text, Survo also can move data from and to text files (ASCII files). All the results of statistical operations can be saved in a text file, too. Observe also that the the operating system provides several options for file copying etc. and those options can be used in conjunction with the operations of Survo. (See OS). The following file types are supported by Survo: 1 = Survo data files 2 = Survo edit files and general text files See also 3 = DATA specification 4 = Survo output file