Home > Communication Service Provider Solutions > Telecom Multicloud Foundation > Canonical > Guides > Reference Architecture—Canonical Charmed OpenStack (Ussuri) on Dell EMC Hardware > OpenStack Ussuri
This architecture guide is based on OpenStack Ussuri - the 21st release of the most popular open-source cloud platform. For this release, OpenStack received over 24,000 code changes by more than 1,000 developers from 188 different organizations and over 50 countries. OpenStack is supported by a global open-source community and at this pace, it continues to be one of the top three open-source projects in the world in terms of active contributions.