# The Keithlisp Standard Library
Keithlisp's built-in functions are grouped into the following
categories:

- [Special Forms](stdlib_forms.md)
- [Arithmetic](stdlib_arithmetic.md)
- [Boolean Logic](stdlib_boolean.md)
- [Comparison](stdlib_comparison.md)
- [Data Structures](stdlib_data.md)
- [Miscellaneous Functions](stdlib_misc.md)
- [Keithlisp Internals](stdlib_internals.md)