From Halopedia, the Halo wiki
A printer fabricator is a piece of human technology in use during the twenty-sixth century. It can be used to manufacture simple objects based off of a plan. It is similar in concept and operation to the 3D printers of the twenty-first century.
Printer fabricators come in several different models, ranging from desk-top models for light work to models meant for the manufacture of large or heavy-duty objects. Printer fabricators are known to posses a carriage arm and can utilize electrostatic polymers.
Rani Sobeck's uncle owned a printer fabrication shop. In 2552, Rani and Trevor attempted a failed business operation to manufacture disposable chatters, shaped like toy purple kittens, using a modified desk-top printer fabricator. The printer fabricator managed to produce 49 items before exploding.
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