4's

The Beatles were also known as the "Fab Four"

1. John Lennon2. Ringo Starr3. George Harrison4. Paul Mccartney
Us Time Zones: 1. Pacific2. Mountain3. Central4. Eastern
suits of playing cards: 1. Hearts2. Diamonds3. Clubs4. Spades
Basic states of matter: 1. Solid2. Liquid3. Gas4. Plasma