http://www.myfonts.com/fonts/thefoundry/foundry-plek/

Foundry Plek and Foundry Flek are created on the same dot matrix grid system.Each family includes: light, regular, medium and bold weights – with a selection of dot patterns that can extend the grid vertically and horizontally. The underlying matrix common to each weight allows experimentation with overlays, and mixing weights produces varying effects. Foundry Plek used conventionally works well for serious correspondence, with a ‘typewriter font’ effect. Foundry Flek has an integral dot matrix grid as a background. With these two fonts a whole new graphic language can be explored.