The new gamma cameras at work utilize IDL as their programming environment, necessitating a need to learn IDL. Recommended resources for learning IDL include the ITT Visual Information Solutions' 'Books and Training Manuals' webpage, which features a variety of texts. The "Introduction to IDL" manual is highlighted as an essential starting point, serving as the basis for ITT's introductory course. Additionally, several comprehensive books authored by experienced IDL programmers are suggested, including "IDL Primer" by Ronn Kling, "An Introduction to Programming with IDL" by Kenneth Bowman, "IDL Programming Techniques" by David Fanning, and "Practical IDL Programming" by Liam Gumley. These resources provide a solid foundation for mastering IDL programming.