SWAG (Seismic Wave Analysis Group) at KAUST is glad to introduce the Madagascar reference manual that includes description and usage information for all functions in rsf.h. These include Data types, preparing for input, operations with RSF files, error handling, linear operators, data analysis, filtering, solvers, interpolation, Smoothing, Ray tracing, General tools, Geometry, and System. The purpose behind this manual is to ease the task of searching for subroutines and understand their function. You can access the manual at book/rsf/manual.