I spent a lot of money on a Finance degree. Then I got my first job and they gave me one of these calculators along with the manual [1]. I then realized that everything I had learned was distilled down to this little booklet. It was a shocking realization. I still have and use it. It&#x27;s a good example of great design.<p>[1] <a href="http:&#x2F;&#x2F;h20331.www2.hp.com&#x2F;Hpsub&#x2F;cache&#x2F;299940-0-0-225-121.html" rel="nofollow">http:&#x2F;&#x2F;h20331.www2.hp.com&#x2F;Hpsub&#x2F;cache&#x2F;299940-0-0-225-121.htm...</a>