Flight Activities was a department, division, or position within Starfleet's Fleet Operations Center on Earth. (ENT: "Demons" set artwork)
In January of 2155, Starfleet officers E. Norman, A. Levy, S. Shimizu, C. Blackwell, and R. Ratliff worked in (or as) Flight Activities.
Flight Activities was seen on directory listings seen on the set of "Demons".
, like many of the other divisions, departments, or positions on the listing, is a reference to NASA
terminology, in this case, the "Flight Activities Officer".