Three items totaling about $2.4 trillion combine for nearly two thirds of President Barack Obama's proposed $3.7 trillion 2012 fiscal year budget.

The expenses for the departments and agencies under President Obama's purview listed as total, outlays on the budget includes mandatory spending required by law and discretionary spending, which the Obama administration can vary.

Spending expected for the Department of Health and Human Services is $892 billion. Spending for the Social Security Administration at $817 billion, and Defense Department spending at $707 billion.

An Overseas Contingency Operations expense of $118 billion includes a budget for military, diplomatic and related expenses, with most of it going to the wars in Afghanistan and Iraq,

The remaining 19 items combined total is nearly $885 million.

See the main items of the Obama administration's proposed budget below.

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ItemTotal, Outlays (in millions of dollars)
Dept. of Health and Human Services

892811

Social Security Administration

817144

Dept. of Defense

707467

Dept. of Agriculture

144014

Dept. of Veterans Affairs

124332

Afghanistan and Iraq - Overseas Contingency Operations

118000

Dept. of the Treasury

114507

Dept. of Labor

109026

Dept. of Education

70927

Dept. of State and Other International Programs

62609

Dept. of Housing and Urban Development

49399

Dept. of homeland Security

46913

Dept. of Energy

43089

Dept. of Justice

33151

NASA - National Aeronautics and Space Administration

18174

Dept. of the Interior

13912

Dept. of Transportation

13431

Dept. of Commerce

13142

EPA - Environmental Protection Agency

9986

Corps of Engineers - Civil Works

8036

National Science Foundation

7906

Small Business Administration

1205

Corporation for National and Community Service

1111

Source: Office of Management and Budget