Section (1) for the commonly-used commands.
Section (2) for Limbo modules, including Inferno's system calls.
Section (3) for kernel devices (accessed by `bind').
Section (4) for file services (accessed by `mount').
Section (5) for the Styx file service protocol.
Section (6) for file formats and system conventions.
Section (7) for databases and database access modules.
Section (8) for administrative modules and system services.
Section (9) for the reference for Inferno's Tk variant, Limbo/Tk.
Section (10) for the build environment and device driver implementation.