Then they divided the whole brain into small sections with a three-dimensional grid and recorded the activity in each section of the grid for each second.

WSJ: How the Brain Really Works | Mind & Matter by Alison Gopnik

To process the MRI data, a computer overlaid on Pickens' brain a virtual three-dimensional grid of 50, 000 cubes called voxels (a word hinting at volume and pixels).

FORBES: Inside T. Boone Pickens' Brain

Recently, researchers writing in Physical Review B suggested that arranging a number of tiny cloaks in a two-dimensional grid could be put to use in biomedicine and sensing, as well as traditional camouflage.

BBC: 'Cloaking' idea traps a rainbow

Using a powerful supercomputer, weather forecasters divide the atmosphere up into an elaborate three-dimensional grid, assign initial values of pressure, wind-speed, humidity and so on, and then apply the laws of physics to see what happens next.

ECONOMIST: Next, the fire forecast