Speaking of TI 99's here is a picture (not a good picture) of the actual prototype switch. 102 of these were used to make up the first keyboards. This quickly became obsolete based upon cost targets. But since I mentioned the product and we are so far off topic anyway, here it is.
No man has a good enough memory to be a successful liar. Abraham Lincoln
2016 36FBTS Pinnacle
2016 F350, 6.7, 4x4, DRW, long bed
B & W Companion 5th wheel Hitch