Emrys365

手动提取了一下目录：

The UNIX Time-Sharing System 1
1. Introduction 1
2. Hardware and Software Environment 1
3. The File System 2
3.1 Ordinary Files 2
3.2 Directories 2
3.3 Special Files 3
3.4 Removable File Systems 3
3.5 Protection 3
3.6 i/o Calls 3
4. Implementation of the File System 4
4.1 Efficiency of the File System 6
5. Processes and Images 6
5.1 Processes 6
5.2 Pipes 6
5.3 Execution of Programs 6
5.4 Process Synchronization 6
5.5 Termination 6
6. The Shell 7
6.1 Standard i/o 7
6.2 Filters 7
6.3 Command Separators: Multitasking 8
6.4 The Shell as a Command: Command files 8
6.5 Implementation of the Shell 8
6.6 Initialization 9
6.7 Other Programs as Shell 9
7. Traps 9
8. Perspective 9
8.1 Influences 10
9. Statistics 10
9.1 Overall 11
9.2 Per day (24-hour day, 7-day week basis) 11
9.3 Command CPU Usage (cut off at 1%) 11
9.4 Command Accesses (cut off at 1%) 11
9.5 Reliability 11
References 11