He copied the file to a USB drive, walked over to The Beast, and plugged it in.

RetroGhost sent a link to a dusty, forgotten FTP server. The URL looked ancient, a mess of IP numbers and slashes. Elias hesitated. Downloading random files from FTP servers at 2:00 AM was a good way to get a virus. But The Beast was air-gapped from the main network. It couldn't infect anything even if it wanted to.

: Though less likely, it could refer to a specific version of a software tool related to Boot Camp.