A PADD showing Kirk and Spock from the "TOS era"
TOS era was a colloquial reference to the 2260s made by Commander Jack Ransom of the USS Cerritos. He said that it referred to "'those old scientists' – You know, Spock, Scotty, those guys. Seems like they were stumbling on crazy new aliens every week back then." (LD: "No Small Parts")