Passwords are different notes found in Prey and Prey: Mooncrash which can be used to access various workstations.
Abby's Password
Transcript
M0visCommunic4tum
Location
This note can be found on a post-it under Abigail Foy's desk in her cabin in Crew Cabins B, Crew Quarters.
Marco Simmons's Password
Transcript
password: IKop0876
Location
This note can be found as a sticky note on Marco Simmons' workstation in the Simulation Lab, Neuromod Division.
Lorenzo Calvino's Password
Transcript
password: KublaiKhan
Location
This password can be found in Danielle Sho's email in her room, Crew Quarters.
Jason Chang's Password
Transcript
0MG!hotboss
Location
This note can be found as a sticky note on Jason Chang's workstation in the Executive Offices, Talos I Lobby.
Mizuki's Password
Transcript
N0H@rm
Location
This note can be found behind a box under a desk in Ken Mizuki's office (Administration Level, Crew Annex), as part of Joan Winslow's story objective A Little Bird Told Me. It cannot be found at any other point in the game.