  Cosmic superstrings are introduced to non-experts. First D-branes and $(p,q)$
strings are discussed. Then we explain how tachyon condensation in the early
universe may have produced F, D and $(p,q)$ strings. Warped geometries which
can render horizon sized superstrings relatively light are discussed. Various
warped geometries including the deformed conifold in the Klebanov-Strassler
geometry are reviewed and their warp factors are calculated. The decay rates
for strings in the KS geometry are calculated and reasons for the necessity of
orientifolds are reviewed. We then outline calculations of the intercommuting
probability of F, D and $(p,q)$ strings and explain in detail why cosmic
superstring intercommuting probabilities can be small. We explore cosmic
superstring networks. Their scaling properties are examined using the Velocity
One Scale model and its extra dimensional extensions. Two different approaches
and two sets of simulations are reviewed. Finally, we review in detail the
gravitational wave amplitude calculations for strings with intercommuting
probability $P<1$.
