This brief broadens readers' understanding of stochastic control by
highlighting recent advances in the design of optimal control for Markov
jump linear systems (MJLS). It also presents an algorithm that attempts
to solve this open stochastic control problem, and provides a real-time
application for controlling the speed of direct current motors,
illustrating the practical usefulness of MJLS. Particularly, it offers
novel insights into the control of systems when the controller does not
have access to the Markovian mode.