Petty Officer, 1st Class Salak was a female Starfleet enlisted crewman assigned to the USS Enterprise-A in 2293.
That year, a drawer labeled with her name was checked during a search for Gorkon's assassins' magnetic boots. (Star Trek VI: The Undiscovered Country)
Salak was an unidentified character played by an unknown actress. Her radiological suit, including said name tag, was sold off at the It's A Wrap! sale and auction. [1]
A male (β) Vulcan by that name appears in the Constellations short story "Chaotic Response (β)". Spock recalls competing against Salak in an entrance examination for the Vulcan Science Academy while trapped in his own mind after being exposed to a Klingon mind ripper.