BitKeeper is a previously proprietary distributed revision control
 system famous for having hosted the Linux kernel before git was
 created.
 .
 Its main strengths include:
  - scalability from tiny to huge projects, specifically with support
    for very large repositories, while maintaining good performance
  - ability to work well with large binary assets
  - simple, intuitive interface
  - safety mechanisms that can prevent and/or fix common filesystem
    and hardware failures, but also human mistakes
  - time-savers such as a better auto-merge than most competing
    systems