Beta Gamma Sigma

I’m in… (and can do the secret hand shakes, if any)

Did some Googling on the origin of the name:

•  Beta is the initial letter of the Greek word bebaeos, which signifies honor.
•  Gamma is the initial letter of the Greek word gnosis, which means wisdom.
•  Sigma is the initial letter of the Greek word spoude, which means earnestness.