The PHOTOS library simulates QED photon radiative corrections in electromagnetic decays. The library is universal; it allows for easy interface with any program generating decays of any particle. It can be used to estimate the size of the QED bremsstrahlung in leading-logarithmic approximation. The proper soft photon behavior is also reproduced. . Note that in order to compile and link programs against this library, you must also install the libphotos202-dev package.