I am not sure of the meaning of the following terms:

Object, Program, Function,Activity(CPA-00947). Can someone explain with examples?

Thanks.

These classifications still confuse me... Anyways, here you go :-

Budget and Accounting Classifications
FUNCTION	Broad classification of government responsibilities, such as public safety, health, education, welfare, recreation, and general government.
PROGRAM OR SUBPROGRAM CLASSIFICATION	Used in program budgeting to group similar activities, often involving several organizational units, for purposes of analysis and evaluation, as well as the allocation of funds.
ACTIVITY CLASSIFICATION	Expenditure data organized according to the responsibilities of governmental units. The Police Department, for example, is responsible for crime investigation, traffic control, crowd control, and so forth.
ORGANIZATIONAL UNIT	Designated units or subunits within the organizational, such as Police Department or Department of Parks and Recreation, authorized to hire personnel and make expenditures.
CHARACTER OF EXPENDITURE	Aggregates of expenditures that have certain specific qualities such as current operating expenditures, capital expenditures, and debt service. Current operating expenditures represent the aggregate of personal services, contractual services, materials and supplies, and some types of equipment expenditures.
OBJECT OF EXPENDITURE	Lowest level of classification. Objects of expenditure are the particular types of goods bought or services received for the expenditures. Examples are: personal services (salaries, wages, and related employee benefits), contractual services, materials and supplies, equipment, property improvements, and debt service.

 Hope this helps !