IT’S BAUD DAY 3/12/24
From the linked site:
Something that SysOps did when they advertised their BBS. Rather than write a BBS’ supported baud rates as “300/1200/2400”, they would write “3/12/24”. The reason for this abbreviation is probably due to how BBSs were advertised back in the day. Most BBSs were advertised in text files. Depending on the host computer, a text file may have 40 or 80 characters per line. So, space was a premium and dropping 6 characters from “300/1200/2400” made a big difference.
A list of over 1,000 (current) BBSes: https://www.telnetbbsguide.com
Most of these BBSes are accessible via telnet - there are many options for telnet, but typically for BBSes you want a terminal that supports ANSI colours and IBM-PC characters (CP437). A recommended terminal program for Win/Mac/Linux is SyncTerm: https://syncterm.bbsdev.net
There are about 40 dialup modem BBSes in the list: https://www.telnetbbsguide.com/bbs/connection/dial-up/
For more information about the world of BBSes in the 1980s and 90s, a great source of history is Jason Scott’s BBS Documentary and Al’s Geek Lab Back to the BBS.