The old HP. The one that designed and built wonderful calculators like my ancient HP 42S. The calculator that still works 25+ years later, and just needs the oc

The old HP. The one that designed and built wonderful calculators like my ancient HP 42S. The calculator that still works 25+ years later, and just needs the occasional purchase of a few button cell batteries to keep it going. The old HP probably would have been able to give Apple a good run for their money in smartphones and laptops.