Clones are genetically engineered beings produced by the Jinteki corporation to serve as slave labour (or "labour solutions" as the megacorporations would put it). Clones are custom-designed for particular roles and then mass-produced via cloning and rapid-growth technologies.
Most of the clones produced by Jinteki are humanoid in form, though some (such as the space-adapted Turtlebacks) are not. All clones have distinctive barcodes tattooed on their necks to indicate their clone status, and that they are items possessed by their creators.
Clones share the highly profitable "labour solutions" market with bioroids produced by the Haas-Bioroid corporation. Clone labour is opposed by those of the group Humanity First. Under current American law, clones may not marry. They are also sterile, and cannot reproduce.