A chromatography software, also known as a Chromatography data system (CDS [ ]), collects and analyzes results delivered. Many chromatography software packages are provided by manufacturers, and many of them only provide a simple interface to acquire data. They also provide different tools to analyze this data. [ ] The most common tool is 'integration': It computes simple areas to delimit peaks by adding valleys automatically or not. Areas are computed between two valleys, a signal, and a baseline. [ ] Applications are also available for simulation of chromatography, for example for teaching, demonstration, or for method development &/or optimization.