Don't fall into the "portability first" trap.

Streams   All of the I/O functions in lisp accept a stream argument. In some cases (e.g. READ and PRINT) the stream argument is optional; by default, ...

Defun and Lambda DEFUN de fines a function with name   You can define a named function using the DEFUN form:   (defun sum (x y)   (+ x y))   The defu ...

Mapping Mapping is a type of iteration in which a function is successively applied to pieces of one or more sequences. The result of the iteration is ...

Hello world Uncommon Web   What is UCW?     UCW is a multi-paradigm framework for building Web based applications in Common Lisp. It has an extensible ...