ACO

ACO was a department, division, or position within Starfleet's Fleet Operations Center on Earth. (ENT: "Demons" set artwork)

In January of 2155, Starfleet officers J. Nesterowicz and P. McWade worked in (or as) ACO.

ACO was seen on directory listings seen on the set of "Demons".

ACO, like many of the other divisions, departments, or positions on the listing, is a reference to NASA and ISS terminology, in this case, the "Assembly and Checkout Officer".