Problem Statement

Cause a line printer attached to the computer to print a line containing the message:   Hello World!

A line printer is not the same as standard output. A   line printer   was an older-style printer which prints one line at a time to a continuous ream of paper. With some systems, a line printer can be any device attached to an appropriate port (such as a parallel port).

Let's start with the solution:

(out '(lpr "-P" "Printer01")
   (prinl "Hello world") )