All the documentation on this site can be downloaded in a variety of different formats (HTML, Postscript, PDF, and more) and compression schemes (BZip2, Zip) from the FreeBSD Download site.
The FreeBSD FAQ (faq)
Frequently Asked Questions, and answers, covering all aspects of FreeBSD.
The FreeBSD Developers’ Handbook (developers-handbook)
For people who want to develop software for FreeBSD (and not just people who are developing FreeBSD itself).
The FreeBSD Architecture Handbook (arch-handbook)
For FreeBSD system developers. This book covers the architectural details of many important FreeBSD kernel subsystems.
The Porter’s Handbook (porters-handbook)
Essential reading if you plan on providing a port of a third party piece of software.
Explaining BSD (explaining-bsd)
An answer to the question “What is BSD?”
Filtering Bridges (filtering-bridges)
Configuring firewalls and filtering on FreeBSD hosts acting as bridges rather than routers.
Fonts and FreeBSD (fonts)
A description of the various font technologies in FreeBSD, and how to use them with different programs.
Build Your Own FreeBSD Update Server (freebsd-update-server)
Using a FreeBSD Update server allows a system administrator to perform fast updates for a number of machines from a local mirror.
Mirroring FreeBSD (hubs)
The all in one guide for mirroring the FreeBSD website, FTP servers, and more.
LDAP Authentication (ldap-auth)
A practical guide about setting up an LDAP server on FreeBSD and how to use it for authenticating users.
Introduction to NanoBSD (nanobsd)
Information about the NanoBSD tools, which can be used to create FreeBSD system images for embedded applications, suitable for use on a Compact Flash card (or other mass storage medium).
FreeBSD Release Engineering (releng)
Describes the approach used by the FreeBSD release engineering team to make production quality releases of the FreeBSD Operating System. It describes the tools available for those interested in producing customized FreeBSD releases for corporate rollouts or commercial productization.
Serial and UART devices (serial-uart)
Detailed information about the use of serial ports on FreeBSD, including several multi-port serial cards.