 This caused all involved to rack up considerable long distance charges as they all called each other during development, or called into each other's BBSes to leave email.During one such call "in May or early June", Baker and Jennings discussed how great it would be if the BBS systems could call each other automatically, exchanging mail and files between them.This would allow them to compose mail on their local machines, and then deliver it quickly, as opposed to calling in and typing the message in while on a long-distance telephone connection.