Qt (pronounced "cute") is a free and open-source widget toolkit for creating graphical user interfaces as well as cross-platform applications that run on various software and hardware platforms. ¹
The currently installed version is available on environment hpc-env/6.4:
Qt/4.8.7-foss-2017b Qt5/5.8.0-GCCcore-6.4.0 Qt5/5.12.1-foss-2017b (D)
If you want to find out more about Qt on the HPC Cluster, you can use the command
module spider Qt
This will show you basic informations e.g. a short description and the currently installed version.
To load the desired version of the module, use the command, e.g.
module load hpc-env 6.4 module load Qt
Always remember: this command is case sensitive!
Documentations regarding the newest version Qt5 can be found here.