I can't find any documentation on what the difference between "S0" and "T0" in the inittab file for granting serial access to console is. People seem to use it interchangeably:
T0:12345:respawn:/sbin/getty -L ttyS0 115200 vt100
vs.
S0:12345:respawn:/sbin/getty -L ttyS0 115200 vt100
Thank you in advance