Grandpa Chuck writes, "CBMBBS, Commodore Business Machine Bulletin Board Software was used with the C64 and C128. The software was sold via mail order for Commodore User Groups in the US and Canada. Later a TDD version was made as used by the University of Califorina for the hearing imparied. The software was sold in the late 1970s and early 1980s. 300-baud, those were the days!"