File IO wasn't portable. Consider the book where this Animal appeared: David H Ahl was aiming at a wide audience. The content was previously in Creative Comput

File IO wasn't portable. Consider the book where this Animal appeared: David H Ahl was aiming at a wide audience. The content was previously in Creative Computing Magazine. It was up to the reader to adapt the BASIC programs to work on their machine. The robot illustrations are the unforgettable charm of that book. It's on the net.