Many modern printers can scan photos and documents. While your computer might work with your scanner, you'll get better results with specific apps.

Many printer brands also offer their own software that lets you scan from your computer. For instance, if you have an HP printer, you can use the HP Smart app to scan documents.

or school setting where posters can be produced without the need of a PC. I found it quite easy to use the printers touchscreen to turn a test scan into a repeated pattern that could be used as ...

Use it with a Canon digital SLR, and you get what they call the Canon-to-Canon Direct Advantage and print directly from the camera to the printer without the need for a PC.