It&#x27;s Diamond Age, and they were &quot;mediaglyphics&quot;.<p><a href="https:&#x2F;&#x2F;www.goodreads.com&#x2F;quotes&#x2F;290233-what-are-letters-kinda-like-mediaglyphics-except-they-re-all-black" rel="nofollow">https:&#x2F;&#x2F;www.goodreads.com&#x2F;quotes&#x2F;290233-what-are-letters-kin...</a>