Each link in the following list points to a destination that relates to etsh and tsh in one way or another. Notice that the (dmr) below refers to resources available on Dennis Ritchie's home page.
- Creation of the UNIX® Operating System (via the Internet Archive Wayback Machine)
- Early UNIX® History and Evolution - EUHE (dmr)
- Historical info about the genesis of UNIX® pipes
- Traditional Bourne Shell Family / History and Development
- Shell (computing) - Wikipedia, the free encyclopedia
- Thompson shell - Wikipedia, the free encyclopedia