Fair enough, but it was the hand held scientific calculator that was a milestone in engineering.
TI was one of the leaders in that field.
TI Still is - try finding an HP 'Scientific' calculator in the stores - slim pickings but there are still lots of good TI ones at excellent prices! I root for TI but like HP they have found it hard to stay at the forefront.
The one current HP that I still find worthy of its heritage is the near-immortal HP-12c Financial which celebrated its 30th birthday this year. I remember teaching evening classes to realtors and brokers on how to use this gem 20 years ago. Like the DC-3 and C-130, there are some items that are the acme of practicality and design and just keep going!