Symbols are entities similar to those of Lisp. They mostly serv the same purpose - referencing variable names and representing keys in dictionaries.
They are defined by backticks followed by an optional name. Names can contain UTF8 letters, digits and dots:
o)`a `a o)`abc `abc o)
o)`a`b`c `a`b`c o)
A dictionary with a symbol vector as a set of keys:
o)`x`y`z!(1 2 3) x| 1 y| 2 z| 3 o)
A symbolic file handle used to refer to a file:
o)`:folder/file.txt `:folder/file.txt o)