Answer:

betas

Answer	Crossword Clue
BETAS	Test versions
BETAS	Trial stages
BETAS	Development phases

BETAS	Often-buggy software versions
BETAS	Not quite leaders of the pack
BETAS	Still-in-development apps
BETAS	Prominent stars in constellations
BETAS	Ones being tested
BETAS	Bug-ridden software releases
BETAS	They're not final releases
BETAS	Obsolete VCR's

BETAS	Alphas' followers
BETAS	Some stars
BETAS	Second-brightest stars
BETAS	Some radioactive electrons