picture
Silence.
Pictograms. Pictographs. Rebus. Hieroglyphics.
A caption
It is called a "rebus".
It is called and an ankh. The Ankh Cross represents life (immortality) and death
An anagram
an acronym
Initialism
The letters are called Symbols. They represent elements on periodic table.
You mean symbols, that represent things on a map. Yea, in a legend it shows the symbol and what it represents/symbolises. x]
The Monkey King One Missed Call
Cry, write letters, call, write emails. Keep pictures. Keep memories fresh in your mind.