comes from the phrase "I am the alpha & the omega" an appellation of God in the Book of Revelation verses 1:8 21:6 & 22:13.similar 2 referring 2 sum1 "the A to Z". when the title appears it is further clarified with the title "the Beginning & the End"
pretty nice script, although it doesn't really "mean" beginning and end, it just might stand for that in your eyes. In reality it's the same as getting A and Z on your arms...just different language.