via @Cyrus Omar https://twitter.com/prathyvsh/status/1272929797803397121

Thanks for the share. It is still highly WIP. Lots of research needs to be done on medieval and modern notation symbols. Would welcome if you guys can recall any cool stuff I should add here. I will be updating that twitter thread as I unearth new ones.

@Prathyush Thanks for starting this! Notations are one of my long-term interests. I'll go though this when I find more time this summer and perhaps propose additions.

@Konrad Hinsen Glad to be of help. Pierce is the standout person here I think. There is also this book called Diagrammatical Immanence which talks about notation from a sort of metaphysical level: https://edinburghuniversitypress.com/book-diagrammatic-immanence.html