Glossary

Terms we use at Achriom

Short, precise definitions of the words that come up across the product and the blog. Link directly to any term with the anchor link beside its name.

AI librarian #: An AI agent that has context on a reader's personal media collection (books, films, albums, shows, anime) and can discuss, recommend, and find patterns across all of it. The term was popularized by Achriom as a distinct category from chatbot-based book recommenders that lack persistent collection context.
Model Context Protocol (MCP) #: An open standard, introduced by Anthropic in 2024, that lets AI clients like Claude and ChatGPT connect to external tools and data sources. Achriom exposes a free MCP server so any compatible AI client can read and write a user's media library.
Cross-media tracking #: Logging and analyzing consumption across multiple media types (books, films, albums, TV shows, anime) in a single library rather than fragmenting data across single-medium apps like Goodreads, Letterboxd, and Last.fm. Cross-media tracking enables pattern recognition that single-medium trackers cannot offer.
Semantic search #: Search that matches meaning rather than keywords. In Achriom, semantic search runs across uploaded EPUBs so users can find passages by theme or concept (for example, "where Didion talks about self-respect") without knowing exact wording.
Media tracker #: An app that logs what a person has read, watched, or listened to, and usually keeps a watchlist or to-read list. Traditional media trackers are single-medium (Goodreads for books, Letterboxd for films, Last.fm for music). Achriom is a multi-medium media tracker with an AI librarian.
Personal library #: A private, user-owned catalog of media. In Achriom, the personal library is the core unit: every feature (search, recommendations, conversation) operates against the user's own collection rather than a global catalog or social feed.
Answer engine #: A search surface that returns a direct synthesized answer rather than a list of links. ChatGPT, Perplexity, Claude, and Google's AI Overviews are answer engines. Answer engines increasingly cite the sources they used, making content structure for machine retrieval a distinct discipline from traditional SEO.
AEO (Answer Engine Optimization) #: The practice of structuring a website so that answer engines like ChatGPT, Perplexity, and Google AI Mode reliably cite it when answering user queries. AEO overlaps with SEO but has distinct signals: schema markup, answer-first prose, FAQ structure, entity consistency across Wikidata and LinkedIn, and content freshness.
Scrobbling #: Automatically logging what a user plays or watches by connecting to a streaming service's API. Last.fm popularized the term for music; Trakt applies it to film and TV. Achriom does not scrobble automatically; it emphasizes deliberate cataloguing over passive logging.
EPUB #: An open ebook file format based on web standards. Achriom accepts EPUB uploads and runs semantic search across their contents, so readers can find passages, themes, and quotes from books they own.

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Terms we use at Achriom

AI librarian

Model Context Protocol (MCP)

Cross-media tracking

Semantic search

Media tracker

Personal library

Answer engine

AEO (Answer Engine Optimization)

Scrobbling

EPUB

See the terms in action