Ruby text was originally meant to indicate proper pronunciation inline.

My name is Adáma-DAHM Brudzewskybroo-DJAY(O)-skee, and now you even know how to pronounce it!

However, ruby text is also useful for annotating concise APL code:

FirstMatrix+.×cross
product
SecondMatrix

Controls used on this page: Base HTML: brcodeh3prtruby