The Institute Advanced Systems is a location in Fallout 4.
Advanced Systems works on applied physics (plasma weaponry and teleportation), as well as other special projects, such as the Institute's reactor. The area also contains Madison Li's laboratory and a shooting range.
Advanced Systems has two sections, the main lab with a shooting range where iterative improvements to the Institute rifle and pistol are being tested. This room also contains a forcefield-blocked access portal to the Institute reactor (an old CIT experimental nuclear reactor), with Madison Li's office in the adjacent room, complete with a bed.
Institute Advanced Systems appears only in Fallout 4.