When you are logged into the shell, you have a choice of editors to use to create and change files, depending on which interface you are using:

• OMVS terminal interface:
  • The full-screen ISPF editor, which you can invoke using the OEDIT or oedit command.
  • The ed editor, a line editor
  • The sed stream editor, a noninteractive editor. It is intended for systematic editing; you invoke the editor with a file of editing commands and a target data file and it produces an edited target file, with no user interaction.
• Asynchronous terminal interface:
  • The vi editor, an interactive editor