Requisition code number
The requisition code number was an identifying code for requisitions. 

In 2370, Quark gave Boheeka the requisition code number for Garak's cranial implant so the Cardassian could look it up. Later, the glinn cursed Quark for involving him because the biotechnology in question and its code number were both classified. Wishing to have no further involvement with the matter, Boheeka feared the Obsidian Order would trace the information request to him. ()
Identification technology