1. Introduction to FITSIO

This is the FITSIO Cookbook that contains an annotated listing of various computer programs that read and write files in FITS format using the FITSIO subroutine interface. These examples are actual working programs which users may adapt and modify for their own purposes. This Cookbook serves as a companion to the FITSIO User's Guide (described below) that provides more complete documentation on all the available FITSIO subroutines.