Spreadsheets and notebooks don't mix, mostly because the latter lack dedicated numeric keypads for punching in big batches of numbers. Logitech comes to the rescue with an affordable accessory: the Cordless Number Pad for Notebooks. Priced at a reasonable $39.99, the CNPN connects to your PC via a wireless USB dongle, meaning you can position it anywhere that makes you happy (within a few feet, of course). Logitech promises six months of operation from a pair of AAA batteries and supplies a protective carrying case. If your notebook doubles as your desktop and you spend a lot of time crunching numbers, this is one accessory you'll definitely want to grab.