The device is organized/designed to remain in the MaxiDAS application as much as possible, but, technically, all of this runs on a Windows CE 5 base, which is a preemptive (multitasking) operating system. You can see that the application launches other applications in tandem, such as the update application and also Windows CE-ish applications, such as the 3rd party WIFI setup and Internet Explorer. Certain design aspects were taken into account and they were able to deploy customized builds of Windows CE and Internet Explorer that have the taskbar disabled and fullscreen mode more or less forced. You can still access Windows CE directly, copy applications onto the internal storage, etc., but there's not much point unless you have a second-hand DS708 that you just want to play around with. Since it's ARM based, that provides some interesting possibilities, but best not to mess with it and definitely not while under warranty or with the intention of continued use for diagnostics work. I did enable the Win CE boottime notification with my name and contact info in case it ever gets stolen (Autel, please consider providing something like that as standard). There are better and cheaper ways to play with a touchscreen Win CE device than via a MaxiDAS.
-Jeff