The Topic Area Audit Books were created during Phase 1 of the Pittsburgh 2050 Comprehensive Plan process.  They capture conditions and trends in Pittsburgh and help frame how the city has changed over time, where it stands today, and where trends suggest it is heading across 20 topic areas. The research so far has been informed by reviews of past plans, original research and analysis, and input from the Department of City Planning and its various partners.  Learning will continue through additional research, stakeholder outreach and working groups, and public engagement.