What is Adjustment of Status?

An individual's immigration status may be changed while in the United States from nonimmigrant (temporary) to immigrant (permanent). The individual must have been inspected and admitted into the US and the individual must be able to meet all other requirements for a green card. The common term for shifting from temporary to permanent status is "adjustment of status".

FYI: A Green Card is a phrase that refers to an individual's immigration status. The expression refers to an I-551 document (Alien Registration Receipt Card or Permanent Resident Card). The card (which is no longer green) is carried by a lawful permanent resident as proof of their status.

What is the USCIS?

The USCIS stands for the United States Citizenship and Immigration Services (USCIS). This agency exists within the United States Department of Homeland Security (DHS). The core responsibility of USCIS is to oversee the lawful immigration of aliens into the United States. The USCIS's goal is to further national security, eliminate immigration backlogs and (according to online sources) improve customer service.

The USCIS performs the administrative functions formerly performed by the US Immigration and Naturalization Services.

According to USCIS's website,

We are the 18,000 government employees and contractors of USCIS working at 250 offices across the world. Achieving our goals becomes possible when the different elements of our organization are engaged and acting as partners working toward a common outcome.

Yes, they blog too: "The Beacon"

and they tweet: "@uscis"