DDU is used to pre-configure a print driver for deployment.

The core product is a Windows-compatible print driver.

Most printing problems can be resolved by obtaining and installing the most recent print driver available for your particular make and model printer.

It is possible you will need to install a postscript print driver.

You may need to change your printer settings or update your print driver.

At a consumer level, PCL data streams are generated by a print driver.

When you delete the print driver, you can't print.

Windows 2000 introduced version 3 print drivers (user mode printer drivers).

Older dot matrix printers used bitmap fonts; often stored in the memory of the printer and addressed by the computer's print driver.

Looks like "a concept of print drivers that are loaded on to it and can be updated" is the answer.