--- title: Your iPhone Keyboard Is Running 1948 Math | daily.dev description: A walkthrough of the statistical foundations behind iPhone's QuickType keyboard, tracing the idea back to Claude Shannon's 1948 information theory paper. The... canonical: https://daily.dev/posts/your-iphone-keyboard-is-running-1948-math-xvczgqxfa twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Your iPhone Keyboard Is Running 1948 Math | daily.dev og:description: A walkthrough of the statistical foundations behind iPhone's QuickType keyboard, tracing the idea back to Claude Shannon's 1948 information theory paper. The... og:url: https://daily.dev/posts/your-iphone-keyboard-is-running-1948-math-xvczgqxfa og:image: https://api.daily.dev/og/posts/XVCZgqXFa.png og:image:alt: Your iPhone Keyboard Is Running 1948 Math og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Your iPhone Keyboard Is Running 1948 Math **[Medium](https://daily.dev/sources/medium_js)** · 7 min read · 0 upvotes · 0 comments ## Summary A walkthrough of the statistical foundations behind iPhone's QuickType keyboard, tracing the idea back to Claude Shannon's 1948 information theory paper. The author rebuilds a next-word predictor using n-gram models (unigram, bigram, trigram) with backoff logic, implemented in Rust. The piece explains why Rust is well-suited for real-time keystroke prediction — no GC pauses, predictable performance, fearless concurrency, and a single deployable binary — while connecting Shannon's original insight about language statistics to modern language models. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Markov Chains are the Original Language Models](https://daily.dev/posts/markov-chains-are-the-original-language-models-pdmbnuegj) · Hacker News · 4 upvotes · 0 comments - [Security reserchers tricked Apple Intelligence into cursing](https://daily.dev/posts/security-reserchers-tricked-apple-intelligence-into-cursing-bj4vjxidi) · The Register · 0 upvotes · 0 comments - [QuickQWERTY 1.2.2](https://daily.dev/posts/quickqwerty-1-2-2-621g8hixf) · Susam Pal · 0 upvotes · 0 comments --- Tags: [#nlp](https://daily.dev/tags/nlp), [#rust](https://daily.dev/tags/rust) [View this post on daily.dev](https://daily.dev/posts/your-iphone-keyboard-is-running-1948-math-xvczgqxfa) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Your iPhone Keyboard Is Running 1948 Math","url":"https://daily.dev/posts/your-iphone-keyboard-is-running-1948-math-xvczgqxfa","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/your-iphone-keyboard-is-running-1948-math-xvczgqxfa"},"datePublished":"2026-07-17T19:29:16.184Z","dateModified":"2026-07-17T19:30:40.453Z","description":"A walkthrough of the statistical foundations behind iPhone's QuickType keyboard, tracing the idea back to Claude Shannon's 1948 information theory paper. 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