organizations in USA who have already outsourced some of its services?

Question

These should be typically mid-size organizations. They could have outsourced any business function like IT or non core functions.

Answer 1

Outsourcing has been going on indefinitely. After WWII, Japan got into the production business. As early as the late 1940's US auto makers were buying auto parts from Japan.
After the American Revolution, the US grew cotton, sent it to England, then bought back cotton fabrics for use in the US.