Cyborg

Cyborgs are people who have had parts of their body replaced with fabricated substitutes or upgrades. Usually cyborg parts replace limbs, but many different types of cyborg replacements exist including organs, bones, muscle, nerves, and even brains. These parts are referred to as prostheses, augmetics, robotics, cyberware, artificial organs, and in the case of brain augmentations: wetware.

Transhumanists
Sometimes known as cyborgists - or colloquially metal-heads -, transhumanists are people who feel dysphoric in their natural bodies and go to lengths to install cyborg replacements wherever they can. In many cases, transhumanists remove perfectly functional body parts in order to receive "upgrades".

Cyborg Abilities
Cyborg body part replacements often confer greater abilities to the user. Replacement legs might grant greater athleticism for example. In the case of wetware, cyborg implants can grant the user the ability to link to nearby devices, satellites, and interplanetary networks.