Which calculators had no known bugs?

[vassilisprevelakis]

I am going to be provocative here, by nominating the HP-9825 as the calculator with no known bugs.

In http://hp9825.com/html/hpl.html it mentions that The language ROMs were never replaced in the field due to a bug.

So while not a calculator as we think about them, it was marketed as a calculator and it had no bugs.

**vp

http://www.series80.org