Note on software downloaded from the Internet on Windows and MacOS:
Microsoft and Apple block such files as they could be dangerous. Windows
and Darwin (MacOS) will not execute files that are marked like that!
Therefore you must unblock (de-quarantize) the downloaded installation
packages and zip archives before using them.

Windows: after download run "powershell unblock-file *" in the download directory,
         alternatively use the file property menu (right mouse click on the
         file in Explorer) and choose "unblock" and "apply" to remove that attribute

MacOS:   use the xattr command (xattr *) in a Terminal to see which files have
         the quarantine attribute set, then delete attribute using "xattr -d" the
         file name and the full name of the quarantine attribute


Install in the following order
==============================

1. oorexx, free, open-source, download from:
   https://sourceforge.net/projects/oorexx/files/oorexx/5.2.0beta/

2. java, free, open source, many free download sites!

   -> Attention! Look for the package that includes JavaFX, the
      packages may have "full" or "fx" in their names.

      Use Java/OpenJDK 8 for this course, download from, e.g.:
      https://bell-sw.com/pages/downloads/

3. bsf4oorexx, free, open source, download from:
   https://sourceforge.net/projects/bsf4oorexx/files/GA/BSF4ooRexx-850.20240304-GA/


Auxiliary software
==================

- IntelliJ, a popular, multiplatform development environment, look for the
  free "IntelliJ IDEA Community Edition" in the lower part of the page at:
  https://www.jetbrains.com/idea/download/?section=windows

  - then install the free ooRexx plugin for IntelliJ with syntax highlighting
    support "ooRexxPlugin-2.5.0-GA.zip" from:
    https://sourceforge.net/projects/bsf4oorexx/files/Sandbox/aseik/ooRexxIDEA/GA/2.5.0/


- vim: a popular, free (Unix-based) editor with ooRexx syntax highlighting, home
       https://www.vim.org/

2025-09-05, rgf