busy beaver

Scott Aaronson's Harvard CMSA talk traces what mathematical truths are knowable, from Godel and Turing to the Busy Beaver function. He covers recent work on Busy Beaver values.

Rob Landley compares Toybox and BusyBox and surveys options for embedded system command-line tools, including GNU. He also tells the story of leaving BusyBox, Toybox becoming Android's command line, and licensing.

Nine minutes of unedited footage of a very busy bicycle and car crossing at Korte Prinsengracht and Haarlemmerstraat in Amsterdam. Cyclists, pedestrians and cars flow through without traffic lights.

Tracy Young, a former construction engineer and cofounder of PlanGrid, speaks at the 2015 Y Combinator Female Founders Conference. She talks about building software for construction superintendents and about customer success.

MORE is Mark Osborne's Oscar-nominated stop-motion short about a joyless inventor in a drab, conformist society who yearns for his younger days. It won Best Short Film at Sundance in 1999.

A sped-up two-minute view of morning rush hour at a busy Utrecht junction, where thousands of bicycles and buses pass each day. It illustrates a city where about a third of trips are by bike.

JJRicks rides in Waymo's fully driverless Level 4 cars in Phoenix with nobody in the front seats, across two long rides. It is the first in a series of such ride videos.

A short clip of Meskel Square in Addis Ababa, a busy crossroads where vehicles and pedestrians mix with few apparent rules. Filmed in 2013.