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.
... 6 - Joseph Schmidt[?], tenor (+ 1942)
March 7 - Reinhard Heydrich, Nazi official
March 20 - B. F. Skinner, behavioral psychologist (+ 1990)
March 23 - Joan ...