# littleosbook/littleosbook

Source for the little book about OS development

Repository: https://github.com/littleosbook/littleosbook
Canonical: https://ross.abutalabs.com/products/littleosbook
Homepage: http://littleosbook.github.io/
Language: CSS
License Family: other
Last push: 2023-04-22T00:45:54+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 5299, "days_push": 1230, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2664, forks 285 (observed 2026-08-28T04:07:09.030988+00:00)

## What it is
The source for 'The little book about OS development', a free book teaching x86 operating system development from boot to paging and user mode. Content is written in Pandoc Markdown and built to HTML or PDF with Make and pdflatex.

## Use cases
- learn how to write an operating system kernel from scratch
- understand bootloaders, GDT, and interrupts
- tutorial on paging and virtual memory
- build a hobby OS with GRUB and Bochs
- study material for OS development course

## When to choose
- you want a concise, hands-on introduction to x86 OS development
- you prefer a short book over massive OSDev wiki coverage
- you need a guided walkthrough from boot sector to user mode

## When to avoid
- you need modern UEFI/ARM or 64-bit OS development coverage
- you want a production-grade OS codebase rather than a tutorial
- you need actively maintained content - the book dates from 2015

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: documentation, developer-tools
- domain: operating-systems, tutorials, education, developer-tools
- platform: cross-platform
- tags: operating-system-development, book, pandoc, osdev, kernel, tutorial, linux

## Member repositories
- littleosbook/littleosbook (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:09.030988+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:18:18.748138+00:00, confidence not recorded.
  - readme: https://github.com/littleosbook/littleosbook (fetched 2026-08-28T04:07:09.030988+00:00, sha 3d67d666158b)
  - homepage: http://littleosbook.github.io/ (fetched 2026-08-29T10:01:00.472986+00:00, sha 219337bf91b1)
- Data as of 2026-08-30T08:39:29.467469+00:00.