<OK, I'll give you that it's possible. But it would be very slow (TeX <contains a lot of routines that are executed when it sees keywords in <the input file, so you'd be for ever swapping things in), and I doubt it <would be practical on a floppy-disk only system. Considering the size of the data file and the DVI result... floppy? Nope. Hard disk or large ram disk(1mb better). Allison