- "I should reach the frontier in about six weeks. With a little luck, the Network will pick me up."
- ―Ellen Ripley (from Alien)
The Frontier was a remote expanse of space and the outer limits of human civilization. It contained the Borderline Region and Far Reach sectors, while the Tartarus Sector, the Bao Sau Sector, and Sector 87 also overlapped with the Frontier.