Yorick is an interpreted language and is useful for scientific computing and numerical analysis. It is similar to Matlab. It can also do interactive graphics package via the X window system, including x-y plots, quadrilateral meshes, and cell arrays, and includes tools to assist making animated and simple 3D graphs. Yorick's binary file package can read or write floating point formats foreign to the machine where Yorick is running. A library of functions written in the Yorick language, including Bessel, gamma, and related functions, multiple key sorting, spline, rational function, and least squares fitting, and routines to read and write netCDF files.