  Two computer codes relevant for the description of deep inelastic scattering
off polarized targets are discussed. The code ${\mu}$ela deals with radiative
corrections to elastic $\mu e$ scattering, one method applied for muon beam
polarimetry. The code HECTOR allows to calculate both the radiative corrections
for unpolarized and polarized deep inelastic scattering, including higher order
QED corrections.
