Gallery
Build a computer from parts
One description makes the mesh and the drawing, and real sizes and mount types decide what fits.
Machines people have built
To scale
Each drawing fills its own picture by default. With scale="real" machines stand side by side at their true relative size on one baseline, and the lines keep the same width at any size.
A live screen
Paint a device's screen with your own words or your own canvas, as often as you like.