It’s the 50th Anniversary of Australia’s SILLIAC computer. Here’s a great website with videos and podcasts.
While you’re at it, check out the slightly older CSIRAC (1947). I visited CSIRAC at the Melbourne Museum in April this year and found it to be an inspiring and humbling experience.
Here’s a short article entitled 60 years of change that talks about the changes that have occurred from Eniac onward.