Halo teman! I think the word "pres" is used for a kind of machine, while "pers" (from Dutch "pers", English translation: "press"), is referring to the "newspaper service", "press" as media.

From WikiWoordenboek:

https://nl.wiktionary.org/wiki/pers

From Wikipedia:

https://en.wiktionary.org/wiki/pers

From Wiktionary bahasa Indonesia:

https://id.wiktionary.org/wiki/pers

http://kamus.sabda.org/kamus/pers

Selamat belajar! :)