Here's a few good articles on the subject, if you want to learn:
http://listverse.com/2012/10/11/10-beatles-innovations-that-changed-music/
http://news.bbc.co.uk/2/hi/entertainment/1452393.stm
http://community.digitalmediaacademy.org/12758-how-the-beatles-changed-music
Hey, Rich -- Thanks for posting these links. Very informative. I confess to missing much of the Beatles phenomena at the time due to focus on college, marriage and then overseas with the Air Force and Vietnam. Also, it was a sore point with me that early-on The Beatles spouted off with disparaging remarks about American women. (Sure wish I could find the direct quote.)
As a result, I never much got into The Beatles. It has only been very recently that I have begun to (somewhat grudgingly) dip my toes in the water regarding this group. I will now agree that some of the music is kinda, sorta catchy. But I will have to listen more.
BTW, which do folks here enjoy more -- their mono or stereo recordings? Just wondering…
Oh, and I'm watching the Grammy Salute as I type this note...