MailChimp: Grow sales with Customer Journey Smarts
As a connoisseur of web trickery, this is a must share:
POW stands for Packaged Offline/online Webpage. It turns out the png format includes ways to save metadata alongside the image file. A powfile has a metadata entry that contains a zip file that contains a full website.
So a PNG file can contain an entire website with multiple resources. Wild. The concept is open-source.