  In a previous paper, the author introduced a covariant causet ($c$-causet)
approach to discrete quantum gravity. A $c$-causet is a finite partially
ordered set that is invariant under labeling. The invariant labeling of a
$c$-causet $x$ enables us to uniquely specify $x$ by a sequence
$\brac{s_j(x)}$, $j=0,1,2,\ldots$, of positive integers called a shell sequence
of $x$. A $c$-causet $x$ describes the microscopic structure of a possible
universe at a particular time step. In general, $x$ represents one of many
universes in a multiverse and $x$ grows by a single element at each time step.
Since early stages of a universe were probably composed of elementary
particles, we propose that elementary particles can be described by simple
$c$-causets. Although we do not have a rigorous theory for such a description,
we present our guess as to how it might appear. The shell sequence can be
applied to find theoretical masses of particles and these seem to approximately
agree with known masses. We point out that the causal order provides a
unification of the strong and weak forces for elementary particles and also
determines the geometry of $c$-causets which describes gravity. Moreover, it
appears that some particles correspond to dark matter-energy.
