The infographic from Parrot Print Canvas is a good reference not only for newbie designers and phorographers.
For instance, “ppi” – the acronym for pixels per inch – is used to describe the pixel density of the smartphone, tablet, or e-reader screen. Something to keep in mind if you are going to buy any of these devices, and the quality of images or videos is for you of high importance.
Via Design Taxi.
More to explore: