Our electronics writer spent a week seeing how Amazon’s first color E Ink digital notebook compares to the best e-readers and digital notebooks.

Thermal printers are cheap to buy, quick to print, and don't need ink. I've been using mine for useful things like labels, and silly fun with my kids.

Discover the history and function of knuckle-busters, manual devices once essential for recording credit card transactions, and how they compare to modern solutions.