CHAPTER 9 The Next Steps for Web Typography
are quite a few reference websites for writers that provide a good starting
point for us all, for instance The Chicago Manual of Style Online^5 , The
Oxford Guide to Style^6 or the more specific UK Government Digital Service
content principles^7. And every Web typographer should write an essay or
an article at some point in their career — at least to change perspective and
learn how content conception works.
I also encourage you to write. You may not be Tolstoy, but shared thoughts can
inspire friends you haven’t met yet.
— Jeffrey Zeldman, Offscreen #3, 2012.
5 http://www.chicagomanualofstyle.org/home.html
6 http://smashed.by/oxford-style-guide
7 https://www.gov.uk/designprinciples/styleguide
non-breaking space
narrow non-breaking
en-quad
em-quad
en-space
em-space
three-per-em space
four-per-em space
six-per-em space
figure space
punctuation space
thin space
hair space  
medium mathematical
A table of spaces available in HTML.