Summary

Supplement 20 to the ITU-T L-series Recommendations provides technical guidance to public authorities on how to improve their procurement practices to purchase green information and communication technology (ICT) goods and services.

This Supplement collects and presents relevant standards, ecolabels and certifications from different organizations to help public authorities achieve green ICT public procurement practices.

The guidance presented here can also be used by private organizations interested in improving their green ICT procurement practice.