It's for my amateur (Ham) radio setup. The big screen will have realtime propgation maps. The other two have programs for running the software defined radio (no knobs), encoding and decoding signals, and a couple of browser windows.
I built my computer about 18 months ago. It has a Intel - Core i7-6850K 3.6GHz 6-Core Processor and runs Windows 10 Pro 64 bit. It has 32 Gig of memory and a SSD for my programs and a hard drive for files.
None of this is too resource intensive, the radio (just a black box) has fairly powerful processors so the computer is really just for input and display.