Just a tiny bit of background, since I thought to myself &quot;Pharo—where have I seen that name before?&quot;<p>This is an implementation of Smalltalk.  I thought that it was the new name for Squeak (<a href="http:&#x2F;&#x2F;squeak.org" rel="nofollow">http:&#x2F;&#x2F;squeak.org</a>), but apparently it&#x27;s rather a fork:  <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Pharo#History" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Pharo#History</a> .