The CAGE Code stands for Commercial and Government Entity Code. Basically, it is a 5 digit code that represents your company. That way, when another government contractor wants to purchase your product, they can specify the part number of your product preceeded by the CAGE code. Otherwise, there is this part number floating around on some document and another reference has to made as to whose part number that is. That reference would include your company name, phone number, address, etc. and would have to be updated on every document that calls out your part number. By using the CAGE code, if you move or you change your phone number, all the referring documents are still correct because your CAGE code never changes and a buyer would be able to find your company in order to purchase more of that product.