QCD Description of Angular Correlations

We review the predictions on angular correlations and their recent experimental tests at LEP and HERA. Power behaviour of correlation functions appear for large angles and reflect the underlying fractal structure in jet evolution. Asymptotic scaling laws work rather well for the low momentum particles. For angular correlations the predictions work at least qualitatively, sometimes quantitatively, at LEP and the higher HERA energies. Some limitations of the approach and possible improvements are discussed.