Chris Monk introduces the new BBC Micro Bit to the Colossus Rebuild. One million Micro Bits - a stripped-down computer similar to a Raspberry Pi - will be given to pupils starting secondary school this autumn.
It's the last day of the Guess that Computer Quiz. Number 5 is live. Can you identify them all? Answer via TNMOC twitter, Facebook or Google+ pages and one lucky winner will win a pair of tickets to Matt Parker's talk.