[adonovan]

I once wrote a contract document in PostScript that changed the wording based on the date. Two parties could cryptographically sign an agreement in the document, which would change when printed on a later date.

One of the reasons we don’t use PostScript so much any more.

[someguyornotidk]

Isn't PDF also programmable? I think it supports javascript and even a subset of PostScript if I'm not mistaken.

[cassianoleal]

> I think it supports javascript

Indeed it does! https://github.com/ading2210/doompdf