The "Reagan Revolution" officially hits federal government agencies today, and the result, if the president gets his way, will be a considerably smaller executive branch.

Here are programs targeted by the president's budget-cutters last April that have been killed by Congress or are expected to expire this fiscal year. Where available, the fiscal 1981 budget figures are provided. AGRICULTURE

* Rural housing supervisory assistance grants ($1 million)

* Equipment assistance for food and nutrition service program CSA

* Entire agency eliminated, some functions transferred to HHS, grants to states shifted to block grants to states (administrative costs $42 million) COMMERCE

* Funds for Commerce representatives on the 10 federal regional councils ($1.07 million)

* Office of Productivity, Technology and Innovation ($5.2 million)--some functions transferred to other parts of the department

* Regional development commissions ($44 million)

* Coastal Energy Impact Programs ($40 million)

* Coastal Zone Management State Grants

* Department's portion of the National Ocean Satellite System DEFENSE DEPARTMENT

* Stand-off Jammer System development

* 8-inch artillery rocket projectile development

* Department's portion of the National Ocean Satellite System

* Shipboard laser-guided weapon system

* Tactical electronic warfare decoy system

* Human and manpower effectiveness study

* Anti-ship torpedo defense development

* VCX (new carrier-on-board delivery aircraft development)

* Mine-laying cargo aircraft development

* Small submarine development

* Laser acquisition device development

* High-altitude high-speed target development

* Upgrade of Titan II missile program EDUCATION DEPARTMENT

* Outreach program to encourage people to go to college ($2.2 million) ENERGY DEPARTMENT

* Fossil Commercialization Program

* Synthetic fuels feasibility studies and cooperative agreements

* Coal loan guarantees

* Solar renewable energy system for bases for the MX missile

* Small hydropower subsidies

* Innovative Conservation Delivery Demonstration Projects

* State energy emergency planning grants

* Economic Regulatory Administration oil and allocation controls

* Standby gasoline rationing program

* Rate reform assistance to public utility commissions

* Foreign country energy assessments EPA

* Local financial assistance for resource recovery

* Solid waste technical assistance panels

* Noise control program EXECUTIVE OFFICE OF THE PRESIDENT

* Council on Wage and Price Stability ($9.4 million) HHS

* Dental training subsidies ($2.35 million)

* National Center for Health Care Technology ($4 million)

* Support for health maintenance organizations ($8.8 million)

* Nursing capitation grants ($9.9 million)

* Merchant seamen health entitlement program and federal funds for Public Health Service hospitals and clinics HUD

* Planning assistance grants to states and regional planning groups for multipurpose land use planning ($34 million originally; rescissions lowered to $19 million)

* Neighborhood self-help development ($9 million rescinded to zero) INTERIOR

* Youth Conservation Corps LABOR

* CETA (Comprehensive Employment and Training Act) jobs programs that subsize public and nonprofit sector jobs ($4.078 billion)

* Demonstration projects to help welfare recipients find jobs in 14 cities NASA

* Search for Extra Terrestrial Intelligence ($1 million) SBA

* Nonphysical disaster loans

* Small business development center programs TRANSPORTATION

* Waterborne demonstration project (a hydrofoil between New Jersey and New York) ($4 million)

* Automotive research program ($12.5 million, $12 million rescinded)