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

[Chuck Guzis]

On 20 May 2009 at 11:40, William Donzelli wrote:

> National Semiconductor actually made calculators back in the 1970s - I
> used to have one maybe 20 years ago, but it is long gone. They also
> made a line of plug compatible S/370 mainframes, as well.

As well as watches and video games.  I still have an NSC watch 
(nonfunctioning) and I recall giving a Pong game to my brother's 
family as a gift back then.

--Chuck