Part 1, scroll down ½ way for a neat picture of the (large) breadboard used for testing:
http://electronicdesign.com/analog/first-handheld-digital-calculator-celebrates-50-years-part-1
Part 2, scroll down ½ way for a neat picture of the first handheld calculator and ancestor of all our little electronic gadgets:
http://electronicdesign.com/analog/first-handheld-digital-calculator-celebrates-50-years-part-2
http://electronicdesign.com/analog/first-handheld-digital-calculator-celebrates-50-years-part-1
Part 2, scroll down ½ way for a neat picture of the first handheld calculator and ancestor of all our little electronic gadgets:
http://electronicdesign.com/analog/first-handheld-digital-calculator-celebrates-50-years-part-2