  As a result of 33 intercontinental Zoom calls, we characterise big Ramsey
degrees of the generic partial order. This is an infinitary extension of the
well known fact that finite partial orders endowed with linear extensions form
a Ramsey class (this result was announced by Ne\v{s}et\v{r}il and R\"odl in
1984 with first published proof by Paoli, Trotter and Walker in 1985). Towards
this, we refine earlier upper bounds obtained by Hubi\v{c}ka based on a new
connection of big Ramsey degrees to the Carlson-Simpson theorem and we also
introduce a new technique of giving lower bounds using an iterated application
of the upper-bound theorem.
