> Calling Symbol() creates a new symbol, a value that’s not equal to any other value. Lisp: CL-USER 1 > (eq (make-symbol "Foo") (make-symbol "Foo")) N

> Calling Symbol() creates a new symbol, a value that’s not equal to any other value. Lisp: CL-USER 1 > (eq (make-symbol "Foo") (make-symbol "Foo")) NIL > Symbols aren’t exactly like anything else CL-USER 2 > (type-of (make-symbol "Foo")) SYMBOL > Trying to concatenate a symbol with strings will result in a TypeError. CL-USER 3 > (concatenate 'string "abc" 'foo "def") Error: In a call to LENGTH: FOO (of type SYMBOL) is not of type SEQUENCE. > There are three ways to obtain a symbol. > Call Symbol() (make-symbol "FOO") > Call Symbol.for(string) (find-symbol "FOO") Other than that symbols in Common Lisp have a package, a value, a function and a property list. Symbols can be interned in a package or not. So-called Keyword symbols are in the package KEYWORD and have itself as the value. :I-AM-A-KEYWORD evaluates to :I-AM-A-KEYWORD.