Final answer:
The Omnibus Budget Reconciliation Act of 1990 was a legislation aimed at reducing the federal budget deficit, distinct from the ACA or Obamacare, which was enacted in 2010 and focused on healthcare reform.
Step-by-step explanation:
The Omnibus Budget Reconciliation Act of 1990 (OBRA '90) was significant United States budget legislation aimed at reducing the federal budget deficit through spending cuts and tax increases. The Act's measures included cuts in defense spending, increases in taxes for the wealthy, and the introduction of PAYGO (pay-as-you-go), requiring that new legislation affecting revenues or expenditures be budget neutral, not contributing to the deficit. This was separate from the Affordable Care Act (ACA), also known as Obamacare, which was a later piece of legislation focused on healthcare reform and enacted in 2010.