Computer RAM question--what does "GSA-US" mean?

Factual Questions
1

http://www.ec.kingston.com/ecom/configurator/modelsinfo.asp?SysID=+10756+&distributor=0&submit1=Search

I’ve got two options here:

What the heck is “GSA-US”? The item details give no info.

2

GSA is the General Services Administration. IIRC they are involved in purchasing, procurement, etc. for Government contractors.

3

Cool. Not me. Thanks.