  A partial Steiner triple system whose triples can be partitioned into $s$
partial parallel classes, each of size $m$, is a $signal$ $set$, denoted
$\mbox{SS}(v,s,m)$. A $Kirkman$ $signal$ $set$ $\mbox{KSS}(v,m)$ is an
$\mbox{SS}(v,s,m)$ with $s=\lfloor\mu(v)/m\rfloor$. When $v \equiv 1$ or $3
\pmod{6}$, then $\mu(v)=b$, so the decomposition of an $\mbox{STS}(v)$ into
partial parallel classes of size $m$ is equivalent to a $\mbox{KSS}(v,m)$.
Table of known existence results is given.
