A is for Archer. Jonathan Archer. Legendary explorer and early President of the young Federation from 2184 until 2192.
B is for B(ar)oner. Pseudonym used by Captain Kirk during the Klingon occupation of Organia in 2267.
C is for Cochrane comma Zefram. He made us go.
D is for Dick Daystrom. Inventor of the Duotronic computer system.
E is for Earth Prime Minister Nathan Samuels, whose contributions in the 2150s helped create the United Federation of Planets just a few years later.
F is for Finney. Ben Finney. It was later determined that 'records officer' meant that Finney was in charge of the crappy music that plays in the turbolifts and Dr McCoy's waiting room. No wonder he went nuts.