Atom is a Haskell DSL for designing hard real-time embedded applications. At Eaton, we use it for automotive control systems. An Atom description is composed of a set of guarded atomic actions that operate on a global program state. Atom makes it easy to manage program concurrency without the need for mutex locking and run-time task scheduling. As such, Atom can eliminate the need and overhead of an RTOS, which traditionally serves these functions. This release includes several improvements to C code generation, including a simplified rule scheduler that consumes less memory and execution time. It also ships with a new unit testing framework that allows the use of assertions and functional coverage points to assist with program verification. http://hackage.haskell.org/package/atom