Hewlett Packard HP 48G Graphing Calculator 32K RAM - Tested - No Case or Manual 88698004241 | eBay
The Last Scientific Calculator? | Hackaday
Hewlett Packard HP 48G Graphing Calculator With Case Tested No Manual 88698004241 | eBay
HP 12C: still the industry standard financial calculator. It's been on the market since 1981. Mine is 34 years old, and performs beautifully. It's older than I am, and will continue to