Science Bobblehead

The Science Bobblehead is a miscellaneous item in Fallout 4. When picked up, it permanently grants one extra guess when hacking terminals.

Location
It is found inside Vault 75 on the desk overlooking the combat test area on basement level 3. Access is granted by retrieving the Vault 75 lab access card from the Gunner commander in the diner to get to this room. Follow the side quest that starts upon entering Vault 75.

Bugs
The extra guess does not stack with the Close to Metal perk.