# 2x2s In reality 2x2s surface interesting axes from which to look at domains — what we should want to do is convert them into periodic tables. [[Periodic tables are a useful way of categorizing]]. [Web URL for this note](http://notes.benjaminreinhardt.com/2x2s) [Comment on this note](http://via.hypothes.is/http://notes.benjaminreinhardt.com/2x2s)