Thank you for pointing this out. I hadn&#x27;t read the last one, and was actually wondering if they&#x27;d just shut down, without concluding in some form or other. Love this stuff:<p>&quot;This brings forth fanciful and motivational questions about domain areas, such as (...) &quot;How many t-shirts will be required to define TCP&#x2F;IP&quot; (about 3), or all the graphical operations needed for personal computing?&quot; (about 10).&quot;<p>[ed: Actually thought the pdf deserved a submission of its own, lets see if other people think so too:<p><a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=11686325" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=11686325</a><p>]