Those familiar with the Slavic Typikon will also be aware that there is a system of symbols used to indicate the relative ranks of liturgical celebrations in Orthodox worship. There are five such symbols and the presence (or absence) of one of the five in the Menaion entry for a given day acts as a rough indicator of how the services are to be conducted.
I recently ran across a Russian page containing a table that lists the major liturgical variations each symbol indicates. I decided to translate the table since it seemed to me a nice handy reference. The below graphics are from the two pages that make up the table in my translation.