Beta (Β β) is the 2nd letter of the Greek alphabet and has a numeric value of 2. Beta should not be confused with a similar-looking but unrelated letter in German language orthography, ß.
In software development, a "beta version" of a product is one that is still in development but is published for testing purpose. See development stage.
... of the Nobel Peace Prize
April 16 - Fifi D'Orsay, actress (+ 1983)
April 22 - Robert Oppenheimer, physicist (+ 1967)
May 6 - Harry Martinson, swedish author, winner ...