PNG

Just like if we open a file, like a PNG, on our computers, all the computers, browsers and everything around the world have agreed on a single way to read these PNG files. Depending on the number of bytes and what the byte data is, it turns those into pixels in a deterministic, specific way.

Matt DesLauriers, Matt DesLauriers on a Generative World

You need it for everything that you collect. You really do, even if it's just a still PNG.

Regina Harsanyi, Preserving Digital Art: Regina Harsanyi, Jon Ippolito