Comment by TDettmering

In the pre-Smartphone era (not really, but I didn't buy one back then), I built a printer that would output a daily report every morning that I could just take with me:

https://www.flickr.com/photos/sfg/albums/72157623026358605

I used an old POS printer from eBay and an Arduino with an Ethernet shield. It was a fun thing, but was made obsolete by smartphones.