SLICOT is a comprehensive numerical software package for control systems analysis and design. While based on highly performant Fortran routines, Matlab and Scilab interfaces provide convenient alternative access for users. In this survey, we summarize the functionality contained in the three SLICOT toolboxes for (1) basic tasks in systems and control, (2) system identification, and (3) model and controller reduction. Several examples illustrate the use of these toolboxes for addressing frequent computational tasks. © Oldenbourg Wissenschaftsverlag.