It&#x27;s just you, as you know what C and Unix are. Most of the people holding their &quot;smartphones&quot; (of which not a single one is significantly different from iPhone, compared to the state before 2007) from this estimate:<p><a href="http:&#x2F;&#x2F;techcrunch.com&#x2F;2015&#x2F;06&#x2F;02&#x2F;6-1b-smartphone-users-globally-by-2020-overtaking-basic-fixed-phone-subscriptions&#x2F;" rel="nofollow">http:&#x2F;&#x2F;techcrunch.com&#x2F;2015&#x2F;06&#x2F;02&#x2F;6-1b-smartphone-users-globa...</a><p>(&quot;6.1B Smartphone Users Globally By 2020&quot;)<p>will never even hear either of C or of Unix.