COINC library: a toolbox for the network calculus. This talk will present the Scilab toolbox for Network Calculus computation. It was developed thanks to the INRIA ARC COINC project (COmputational Issue in Network Calculus see bouillar/coinc/spip.php?rubrique1 ). This software library deals with the computation of ultimately pseudo-periodic functions. They are very useful to compute performance evaluation in network (e.g. Network Calculus) or in embedded system (Real Time Calculus)