Data Transformation Services...
It is used for importing and exporting data...
Davidson
it can be used for many useful different things also, not just importing and exporting...
run windows batch files, to do all sorts of things when processes are complete for example.
schedule tasks at given times...
You can run large tasks easily, for example a monthly system update which will take hours and lots of user monitoring, can be made into a DTS and run without any/little user input.
James