"Quantum ESPRESSO is a suite for first-principles electronic-structure calculations and materials modeling" (Wikipedia). In short, this software is used to perform complex modeling of electron configurations, and chemicals in general.
The below can be used to view all of the installations of Quantum ESPRESSO on a particular system, where this example uses Coeus.
$ module avail |& grep -i quantumespresso
Chemistry/QuantumEspresso/6.4.1/mvapich2-2.2-psm/gcc-7.2.0
To invoke one of the Quantum ESPRESSO binaries, use the below. For more, refer to Quantum ESPRESSO's documentation.
$ module load Chemistry/QuantumEspresso/6.4.1/mvapich2-2.2-psm/gcc-7.2.0
$ bands.x