1. Unix system administration
2. Foreword
3. 1. History
4. 1. 1.1. Multics
   2. 1.2. Unix
   3. 1.3. Unix Philosophy
   4. 1.4. C language
   5. 1.5. Innovations
   6. 1.6. Unix Wars and Fragmentation
   7. 1.7. The GNU Project
   8. 1.8. Linux Kernel
   9. 1.9. Key Contributors
   10. 1.10. Historical Milestones
5. 2. BSD
6. 3. Unix-like
7. 4. UNIX
8. 5. Licensing
9. 6. Standards
10. 7. Conclusion