Yes, I knew about both of them (dc and bc) from before, having worked on Unixen for years. And have used bc a lot. Check out the useful bc -l option. Here is

Yes, I knew about both of them (dc and bc) from before, having worked on Unixen for years. And have used bc a lot. Check out the useful bc -l option. Here is the page for bc: https://en.m.wikipedia.org/wiki/Bc_(programming_language) https://en.m.wikipedia.org/wiki/Bc_(programming_language) which is mentioned in the dc page's See Also section, which is what I alluded to in my earlier comment above, i.e. that bc is built on dc. See the History section of the bc page.