Their oldest of three platforms was in its own whole OS, with a centralized server and command line remote access to it. They then changed over to everything r

Their oldest of three platforms was in its own whole OS, with a centralized server and command line remote access to it. They then changed over to everything running as services under Windows servers, including a wacky append-only plaintext file system for audit logs. I used to support their scanning and archiving stuff, which mostly meant fixing the horrible layers of Windows folder permissions on various Windows versions.