Hacker News
- TIL there is a device called a planimeter which measures area of arbitrary 2D shapes by using Green's theorem. http://en.wikipedia.org/wiki/planimeter 55 comments math
Linking pages
- From the vault: Watching (and re-watching) “The Mother of All Demos” | Ars Technica http://arstechnica.com/the-multiverse/2015/04/from-the-vault-watching-and-re-watching-the-mother-of-all-demos/ 24 comments
- Inventing the Mouse – Collective IQ Review http://collectiveiq.wordpress.com/2013/04/12/inventing-the-mouse/ 0 comments
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