Community Districts (CDs)
Joint Interest Areas (JIA) e.g. parks and airports
Neighborhood Tabulation Areas (NTAs): Neighborhood Tabulation Areas (Formerly "Neighborhood Projection Areas") are aggregations of census tracts that are subsets of New York City's 55 Public Use Microdata Areas (PUMAs). Primarily due to these constraints, NTA boundaries and their associated names may not definitively represent neighborhoods.
Public Use Microdata Areas (PUMAs): Public Use Microdata Area. A US Census statistical area, created by aggregating census tracts. PUMAs are designed to have 100k residents. The City of New York correlates them with Community Districts.