Discover What's In Your Data. IDL is the trusted scientific programming language used across disciplines to extract meaningful visualizations from complex numerical data. With IDL you can interpret your data, expedite discoveries, and deliver powerful applications to market. Additionally, IDL is a truly cross-platform solution, providing support for todays most popular operating systems, including Microsoft Windows, Mac OS X, Linux, and Solaris. The IDL development language is used to customize and extend all products in the ENVI Platform. This powerful capability allows you to incorporate custom algorithms, workflows, and more into your analysis. IDL works seamlessly with ENVI and ENVI LiDAR to provide you with all the tools necessary to customize and extend analysis capabilities with ENVI library routines, custom file readers and writers, batch mode programs and user functions.