For a vertical mouse, consider the Evoluent VerticalMouse: <a href="http:&#x2F;&#x2F;evoluent.com&#x2F;products&#x2F;vm4r&#x2F;" rel="nofollow">http:&#x2F;&#x2F;evoluent.com&#x2F;products&#x2F;vm4r&#x2F;</a><p>Regarding the interviewee&#x27;s comment about portability, my VM and Kinesis Freestyle (<a href="http:&#x2F;&#x2F;www.kinesis-ergo.com&#x2F;shop&#x2F;freestyle2-for-pc-us&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.kinesis-ergo.com&#x2F;shop&#x2F;freestyle2-for-pc-us&#x2F;</a>) traveled 25,000+ miles on a dozen flights in the past few years. Split keyboards are incredibly portable. Combine with a Crate or Stanton foldable stand to elevate the laptop.<p>For anyone choosing a keyboard, <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=9605262" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=9605262</a> has more comments.