Add a purpose and description of site contents to README.md

README.md

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-# Archive
+# LEGO® MindStorms RCX Archive
 An archive of software releases related to the LEGO® MindStorms RCX
+
+### Official Releases from LEGO®
+* [LEGO® MindStorms Robotics Invention System](https://github.com/BrickBot/Archive/releases/tag/LEGO)
+
+ 
+### Supporting Software
+While not directly related to the RCX, they can be of particular value in working with the RCX.
+* [com0com](https://github.com/BrickBot/Archive/releases/tag/com0com): A suite of drivers and tools offering virtual serial ports, serial port redirection, and more
+* [Original NetBeans IDE](https://github.com/BrickBot/Archive/releases/tag/NetBeans) (pre-Apache, as used to be available bundled with the JDK): Was used in the development of some open source software designed for the RCX (e.g. [VisualNQC](https://github.com/BrickBot/VisualNQC))
+
+ 
+### Legacy Environment Setup
+Dependencies and related software that might be of use if setting up a legacy environment
+* [Windows 9x](https://github.com/BrickBot/Archive/releases/tag/Win9x): The latest-and-greatest versions of dependencies and related software for a Windows 9x environment.
+
+ 
+
+This repository is typically kept in read-only (archive) mode to guard against accidental changes, modifications, or deletions.