Also vintage of the era is ZOC[1] which was a dialer and terminal emulator whose "O" used a yellow lightning bolt. [1] https://www.os2world.com/wiki/index.php/

Also vintage of the era is ZOC[1] which was a dialer and terminal emulator whose "O" used a yellow lightning bolt. [1] https://www.os2world.com/wiki/index.php/ZOC https://www.os2world.com/wiki/index.php/ZOC (The Wikipedia page for the application does not have the same splash screen that the above link does and the above is certainly the version I remember.)