Font used on HP calculator keys

[Joe Horn]

(09-02-2016 11:22 AM)emece67 Wrote:  Perhaps it is a customized Helvetica.

That is correct. At HHC 2009, Tim Wessman said that the font used on older HP calculators was called "HP Helvetica". It had some decidedly non-Helvetica special characters, such as the stylized "x" and "y" on the key. That font (especially those special characters) has not been used on the more recent models.