bbs - Computer Definition
A computer system running software that enables one to connect over the Internet to what is essentially an electronic bulletin board. BBSs generally are focused on specific topics such as a rock band, a software application, or unusual computer or network technical issues. Generally, anyone can access the BBS to post messages, reply to messages, post software applications for downloading by others, play games, and otherwise communicate and share with others. See also Internet.
Chat room talk meaning “be back soon.”