You can split your screen on a Windows 10 computer by snapping two, three, or four windows into place.

You can use split screen on an iPad to view multiple apps at once and multitask with features like Split View and Slide Over.

I've dabbled with integrating portable monitors into my life in the past, but that was in the day when most of the affordable ones were pretty awful. This one from Acer, though, is a little different.