I signed for two reasons.
Firstly, the disgusting way Alan Turing was treated by the British ruling classes of the day, shades of Oscar Wilde in Victorian times and secondly, this man did so much to add academic distinction to my alma mater.
So who was Alan Turing?
Alan Turing is most famous for his code-breaking work at Bletchley Park during WWII, helping to create the Bombe that cracked messages enciphered with the German Enigma machines.
However, he also made significant contributions to the emerging fields of artificial intelligence and computing.
In 1936 he established the conceptual and philosophical basis for the rise of computers in a seminal paper called On Computable Numbers, while in 1950 he devised a test to measure the intelligence of a machine. Today it is known as the Turing Test.
After the war he worked at many institutions including the University of Manchester, where he worked on the Manchester Mark 1, one of the first recognisable modern computers.
There is a memorial statue of him in Manchester's Sackville Gardens which was unveiled in 2001.In 1952 Turing was prosecuted for gross indecency after admitting a sexual relationship with a man. Two years later he killed himself.
The petition was the idea of computer scientist John Graham-Cumming.
An apology is being sought for the way the mathematician was treated after his conviction. He has also written to the Queen to ask for Turing to be awarded a posthumous knighthood.
Alan Turing was given experimental chemical castration as a "treatment" and his security privileges were removed, meaning he could not continue work for the UK Government Communications Headquarters (GCHQ).
I doubt that an official apology to Alan Turing is likely, as he has no known surviving family, but I'm sure that the real aim of the petition is symbolic.
The most important thing to me is that people hear about Alan Turing and realise his incredible impact on the modern world, and how terrible the impact of British Government prejudice was on him.