* gcd: Numerical Functions.
* gensym: Creating Symbols.
* gentemp: Creating Symbols.
-* get*: Property Lists.
* get-setf-method: Customizing Setf.
* getf: Property Lists.
* ignore-errors: Assertions.
* remove-duplicates: Sequence Functions.
* remove-if: Sequence Functions.
* remove-if-not: Sequence Functions.
-* remprop: Property Lists.
* remq: Sequence Functions.
* replace: Sequence Functions.
* rest: List Functions.