Does anyone have any info about 1970s-era National Semiconductor LED modules?

[William Maddox]

--- On Wed, 5/20/09, Ethan Dicks <ethan.dicks at gmail.com> wrote:

> The ones with 8 digits installed are
> very possibly calculator modules.  I've never seen this
> sort of display with only 6 digits out of 8 populated.

National made a 6-digit fixed-point calculator chip.
Commodore sold a calculator, claimed to be the first
to break the $20 barrier (in 1974 or so), that used
it.

--Bill