Data files have the same structure as in SURVO 84C and 98. Thus all data files (with the .SVO extension) created in SURVO 84C are accepted in SURVO MM. However, there is one important extension in SURVO MM: In data files with very many fields (variables) SURVO MM permits long explanations in names of fields. In SURVO 84C the total amount of text in these names and other descriptions of fields is limited to 65500 bytes. In SURVO 84C the maximum number of elements in a matrix was 8100, i.e. 90x90 is the largest allowed size for a square matrix. In SURVO MM it is possible to operate with much larger matrices. For example, In a 128MB memory one may handle 1000x1000 matrices by various MAT operations. Again representations are identical in both systems. S = More information about SURVO MM