Communication means since 1911 include AIRMAIL, which is a system of sending letters, parcels, and packages through the air. It was first used in 1911 when the United States Postal Service began using airplanes to deliver mail. Airplanes were used to transport mail between New York and Washington, D.C., and the service was eventually expanded to other cities. AIRMAIL has become an important part of communication since its introduction, allowing for faster delivery of mail than traditional methods.