A cyborg is a biological organism, (human, ghoul, super mutant, dog etc.) whose physical or mental abilities are extended beyond normal limitations by either electronic, mechanical or robotic elements built into the body (i.e. Implant).
Cyberdogs - dogs with at least a mechanical part and an organic part. Their physical and mental abilities have been modified robotically and cybernetically, creating a kind of canine-robot hybrids. Unique model include Gabe (enhanced with huge intake of psycho) and K-9 (enhancements to the brain and vocal organs). Notable cyberdogs include Robodog (pet of Dr. Henry), Rex (pet of The King) and Roxie (temporary companion of the Courier).
Frank Horrigan - fused to a modified version of Enclave power armor specifically made to encapsulate Horrigan's bulk, Horrigan cannot separate from his power armor as it acts as life support keeping him alive by pumping him full of drugs.
Robert House - kept alive for over two hundred years by a life support chamber, House controls the computers and PDQ-88b Securitrons through cerebral implants. And notably has enhancements to pump food into his stomach, an enhancement around his heart that most likely acts as a pacemaker, and a waste pump around his crotch.
Dead MoneyChristine Royce - forcefully implanted in the Big MT, Christine has had several cybernetic modifications to her brain allowing her to do complicated equations and math more easily but problems during surgery has affected parts of her brain such as the Broca's area and primary visual cortex causing problems comprehending reading and being unable to write properly.
Old World Blues (add-on)Think tank - a special type of brain bot. It consists of a robotic bodies housing a human brain with three monitors coming down from the main body, two monitors depict eyes and one below the two a mouth.
Old World Blues (add-on)Courier - The Courier became a cyborg after their visit to Big MT. The brain, heart, and spine have been removed and replaced by high-tech artificial mock-ups of the organs adding durability to the Courier.
B1000 - a unique cybernetic brahmin covered with living brahmin tissue over a metal T-bone.
Reavers - the reavers are technologically strong in cybernetics enhancements and surgical augmentations, often use for their body, mostly scanning sensor that allow at least to sweep an area of twenty feet, detecting even a person who is sneaking. They are also known to use enhanced eye sight, hand surgical implants, central processors and valve-tube augmentation.
Simon Barnaky - after being kidnapped by the Calculator, Simon Barnaky became a unique humanoid brain bot. It consists of a large humanoid robotic suit equipped with a cannon on its left arm that a combination of a .50 machine gun and a missile launcher as well as a large claw on its right arm for close combat housing a human brain connected to a robotic program.