While the traditional snail mail pen pal relationship has fallen into a decline due to modern technology closing the world's communication gap, prison pen pal services have combined technology with traditional letter writing. These sites allow prisoners to place pen pal ads online; however, inmates in the United States and most of the world are not permitted to access the Internet. Therefore, the pen pal relationships with inmates are still conducted via postal mail. Other pen pal organizations have survived by embracing the technology of the Internet.