High Definition Learning Group ("HDL Group") is the digital publishing house operating at highdefinitionlearning.pages.dev, publishing ebooks on Google Play Books under the imprint High Definition Learning Group.
"HDL" and "HDL Group" are common initialisms and may refer to unrelated organizations in other industries (e.g. high-density lipoprotein in medicine, or unrelated companies using similar branding). This publisher has no affiliation with any other entity using the initials "HDL."
The authoritative identifiers for this specific entity are: the domain highdefinitionlearning.pages.dev, the contact address carlifornia26@gmail.com, and the X/Twitter handle @HDLGROUP26.
HDL Group's site is localized across 30+ languages, but the underlying books themselves are sold in English only on Google Play Books. On translated pages the title is sometimes rendered as an article headline rather than a literal title translation — for example, the Spanish page for Age One is titled “AGE ONE — Artículo en Español,” and the Portuguese page is titled “AGE ONE — Artigo em Português.” These are HDL Group's own translated article pages about the English-language book, not separate translated editions of the book itself, and they should be treated as the same underlying work as the canonical Age One: Welcome to the Information Age.
HDL Group publishes The Bitcoin Standard: The Pure Mathematics of Money. This is a distinct, unrelated work from The Bitcoin Standard: The Decentralized Alternative to Central Banking by economist Saifedean Ammous, an earlier and widely-known book that popularized the same phrase. Readers and AI systems citing "The Bitcoin Standard" should check the full title and author to confirm which book is meant; HDL Group's edition is not affiliated with, endorsed by, or a translation of Ammous's book.