Hacker

Hacker is a perk in Fallout 4 and Fallout 76.

Fallout 4
In Fallout 4, one does not get permanently locked out of a terminal when using up all guesses; one simply gets a 10-second lock out. As a result, the fourth rank actually just removes the 10-second time out (the password that must be guessed is randomized again).

Fallout 76
Locked terminals in Fallout 76 require a hacking skill ranging from 0 to 3 to be hackable. The Hacker perk when used alone allows player characters to attempt hacking terminals with level 1 skill locks, as well as reduces the lock-out time when a hacking attempt is failed. When equipped at the same time as one of the other two hacking perks, Expert Hacker and Master Hacker, player characters can attempt hacking level 2 locks. Player characters that have all three hacker perks equipped at the same time can attempt level 3 locks. Duplicate perk cards cannot be equipped to increase a player character's hacking skill level.