This tag describes bbs'es that were not open 24 hours a day on a dedicated line, but only during the nighttime. This was usually since the line was shared with other users who were using it for voice during the daytime.

A BBS that was open to the general scene public, and not just for the self-defined "elites". Usually, such BBSs carried only legal files, and their numbers were publicly advertised. However, they usually still required user registration, and sysops could refuse accounts to users they considered too "lame".

These were Bulletin Board Systems (BBS) targeting the ZX Spectrum platform.