"It seems to be a system disk used to release the treatment room lock."
— Item examination - English
— Item examination - Japanese
System Disk (システムディスク shisutemu disuku ) is a key item in Resident Evil 3: Nemesis.
This item is necessary for entering the Treatment room.
Checking the door of the Treatment room, Jill can read: "The door is solidly locked.". The panel next to the door reads: "Please insert a System Disk to unlock."
It is noticeable, that after using the disk near the room panel, Jill will enter the Treatment Room on the cutscene.
The disk disappears from the inventory after using.
- BIOHAZARD 3 LAST ESCAPE OFFICIAL GUIDEBOOK. Famitsu. 1999.