Va4i1.zip -

If you can provide the following, I can give you a more tailored breakdown:

This file will likely contain the name of the software, version, and usage instructions. va4i1.zip

(e.g., old floppy disk, specific website)? If you can provide the following, I can

Are you trying to or just extract specific data ? If you can provide the following

A program designed for raster-to-vector conversion.

Using the software's engine to create lines/splines.

inside the zip after you extract it?