A beta version of a program, game etc… is an unfinished version released to either the public a select few or whoever signs up to beta test it for bugs or glitches (Source: Urban Dictionary) The focus of beta testing is reducing impacts to users The process of delivering a beta version to the users is called beta release and this is typically the first time that the software is available outside of the organization that developed it. (Source WikiPedia)
This article needs additional citations for verification. (December 2012)
Beta (UK: /ˈbiːtə/, US: /ˈbeɪtə/; uppercaseΒ, lowercaseβ, or cursiveϐ; Ancient Greek: βῆτα, romanized: bē̂ta or Greek: βήτα, romanized: víta) is the second letter of the Greek alphabet. In the system of Greek numerals it has a value of 2. In Ancient Greek, beta represented the voiced bilabial plosive /b/. In Modern Greek, it represents the voiced labiodental fricative /v/ (while /b/ in foreign words is instead commonly transcribed as μπ). Letters that arose from beta include the Roman letter ⟨B⟩ and the Cyrillic letters ⟨Б⟩ and ⟨В⟩.