This website talks about software detection of currency (and it&#x27;s well worth a read): <a href="http:&#x2F;&#x2F;www.cl.cam.ac.uk&#x2F;~sjm217&#x2F;projects&#x2F;currency&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.cl.cam.ac.uk&#x2F;~sjm217&#x2F;projects&#x2F;currency&#x2F;</a><p>And here&#x27;s a thread about it: <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=7006848" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=7006848</a><p>Here&#x27;s a thread about a BBC article: <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=9776985" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=9776985</a>