Which is not a category of business or industry covered under osha standards?

The OSH Act established a separate program for federal government employees. Section 19 of the OSH Act makes federal agency heads responsible for providing safety and healthful working conditions. Although OSHA does not fine federal agencies, it does monitor them and conducts inspections in response to workers’ reports of hazards. Under a 1998 amendment to the OSH Act, the U.S. Postal Service is covered under the OSH Act just like any private sector employer.

The Act does not cover:

i'm not sure, but can you answer my most recent question?