The Beatles were one of the most influential music groups of all time. The sheer amount of creative, unique, hit material they produced in such a short period of time is still played today across the world and enjoyed by many. Beatles mania may not be as bad as it was in the 60's and 70's, but they are still a wonderful group to listen to any time you are relaxing or taking a trip.
During their reign, the Beatles were very successful and busy, and after they stopped performing their hits went on to later become timeless classics and sold on late night TV infomercials. Most states will have their "oldies" radio stations that will usually play a few Beatles songs per day minimum, though the best way to remember them is to download their music onto your iPod and have it with you no matter where you are.
Just open up iTunes and do a search for Abbey Road or any other classic, and you are bound to find anything from the original recordings to remixes and more.