1.The BIGGIE is that HUGE RED CLOUD in the chart called SOCIAL PROGRAM Spending, which consumes 58% of the budget. (To place this in perspective, in 1948 social spending was but 10% of the federal budget - - prior to the New Deal it was near zero).
2. Defense is next at 18.8% of the budget. From the Special Summary Report it is shown that national defense was the number one reason our founding forefathers gave for forming a federal government, yet it is allocated but 19% of the budget - - meaning 81% of federal spending is on other things mostly not included in their reasons for forming a federal government. (see National Security Report)
3. 'Other' in the chart represents the balance of the government, which consumes 14% of the total for such items as FBI, Treasury, Interior, Justice, EPA, etc. - which lately has been rising faster than the economy.