1. "Multics is an influential early time-sharing operating system based on the concept of a single-level memory." (Wikipedia: Multics, 6.21.23 UTC 04:11)
2. "Multics is the first operating system to provide a hierarchical file system, and file names can be of almost arbitrary length and syntax." (Wikipedia: Multics, 6.21.23 UTC 04:11)
3. "Another major new idea of Multics was dynamic linking, in which a running process can make external routines available by adding the segments containing them to its address space." (Wikipedia: Multics, 6.21.23 UTC 04:11)
4. "Influence of Multics on Unix is evident in many areas, including the hierarchical file, redirection, the shell, and the naming of some commands." (Wikipedia: Multics, 6.21.23 UTC 04:11)
