The Entropy Centre

After beating the game, you cannot use chapter select to collect any missed terminal messages, because using chapter select will reset your progress. You can continue playing your save slot from the very beginning again, but if you don't know which terminal messages you missed, you basically have to play through all acts until you've found them.

Because of this, I recommend using this spoiler-free guide with screenshots of all terminal locations: https://www.neoseeker.com/the-entropy-centre/Terminal_Locations