Hotline/KDX Many years ago, long before the internet became, lived an era where some people would run or access bulletin board systems (BBS) and most would use their modem and dial up to a BBS in order to obtain new software, send/receive messages with other people, and generally exist in “online” communities. The BBS was entirely text mode, you would dial up someone’s computer, spend some time looking for, downloading, and sometimes uploading files.