Q4OS emphasizes the Trinity Desktop Environment (TDE), which continues the legacy of the old KDE 3.5 desktop. The latest release, Q4OS 2.5, was available only for 64-bit (x86_64) and 32-bit (i686 PAE) hardware architectures, but now it can also be installed on ARM hardware like the Raspberry Pi, Pine64, and Pinebook. A lot of work went into optimizing the Q4OS operating system for ARM devices, and while users can download and install it on the well-known Pine64 single-board computer and the Pinebook ARM laptop, the Q4OS 2.5 “Scorpion” release is optimized for Raspberry Pi devices.