As we have mentioned, it can be cumbersome and impractical to try to maintain your data in a LINGO model file. This is particularly true if you have more than just a small handful of data—as is the case with most practical models. Spreadsheets are adept at handling small to moderate amounts of data. Spreadsheets are also very useful tools for manipulating and presenting the results generated by your model. For these reasons, LINGO has a number of features that allow the user to import data from spreadsheets and export solutions back out to spreadsheets. These features include real-time Object Linking and Embedding (OLE) links to Excel, OLE automation links that can be used to drive LINGO from Excel macros, and embedded OLE links that allow you to import the functionality of LINGO into Excel. At present, all of these features are supported only under Windows versions of LINGO.