Khurram Wadee ✅<p>After looking for a long time, I finally found this <a href="https://mastodon.org.uk/tags/Sliderule" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Sliderule</span></a>, which belonged to my late father. Some of you will know that these <a href="https://mastodon.org.uk/tags/devices" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>devices</span></a> were used, before the advent of digital <a href="https://mastodon.org.uk/tags/Calculators" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Calculators</span></a>, to perform <a href="https://mastodon.org.uk/tags/arithmetic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>arithmetic</span></a> operations such as <a href="https://mastodon.org.uk/tags/multiplication" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>multiplication</span></a> and <a href="https://mastodon.org.uk/tags/division" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>division</span></a> to about three significant figures, by <a href="https://mastodon.org.uk/tags/scientists" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>scientists</span></a> and <a href="https://mastodon.org.uk/tags/engineers" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>engineers</span></a>.</p><p><a href="https://mastodon.org.uk/tags/Mathematics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Mathematics</span></a> <a href="https://mastodon.org.uk/tags/Computation" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Computation</span></a> (1/2)</p>