The Hacker perk allows you to hack increasingly difficult computer terminals, and may even prevent a lockout.”— Fallout 4 loading screen hints
Hacker allows the player to hack terminals better. Each rank increases the difficulty tier of terminals the player is allowed to hack (first rank allows hacking advanced terminals, second allows hacking expert terminals, and third rank allows hacking of master terminals). The fourth rank allows the player to never get locked out of a terminal after failing a hack.
- Hacker is the replacement of one aspect of the Science skill.