Semantic Technology: SPARQL Demonstration
Here is a SPARQL Query Form demonstrating the use of a simple RDF graph and query engine.
Dr. Nim for the PiDP-11


On an unrelated note, I enjoy working with historical computing platforms. Here is a Dr. Nim Game written to run on the PiDP-11, an excellent replica of the PDP-11. The game was written to run on the 2.11 BSD OS, using an open source HTTPD.
The source code for these projects is available on GitHub: 2.11 BSD HTTPD and 2.11 BSD Dr. Nim.