Normally this whole process of creating the PRN file is transparent, you print a document in your favourite application and the paper starts feeding through the printer. There can however be some uses for intercepting and capturing a PRN file before it gets to the printer.
(Lego) Brick Inventory DB. With this application, the user will be able to inventory his / her lego set collection, and build an inventory of the parts in those sets. Main goal of the project is to enable data exchange between different inventorying efforts, essentially connecting those isles together.
Also, take note that certain items will occupy more space in your inventory, such as creepvine cluster samples, metal salvage, creature eggs, and handheld equipment. With that in mind, make sure to only pick up these items if you need them right away. Otherwise, your inventory will clutter up fairly quickly.