These are the three main pension systems used in Newsday's databases and stories.

Employees’ Retirement System
Working members. 530,023 state and local government employees statewide including nonprofessional school workers; 82,938 on Long Island.

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Police and Fire Retirement System
Working members. 33,052 police and firefighters statewide; 6,416 on the Island.


Teachers’ Retirement System
Working members. 280,338 school administrators, teachers and other professionals statewide; 60,922 on the Island.