HBO's The Wire introduced the idea of communicating code via images on a clock, which clockfags here have also used to illustrate connections, patterns, and coded communication by Q.

POTUS repeatedly uses Game of Thrones imagery and fonts in his communications.

Pointing us to HBO & GOT.

The HAND. The hand symbol is a Q.

Advisor to the highest authority of the land, and empowered to act as said voice in its absence.

https://gameofthrones.fandom.com/wiki/Hand_of_the_King