Amazing documention for a heck of a long time!
All architectures
alpha
amd64
arm64
armv7
hppa
i386
landisk
loongson
luna88k
macppc
octeon
powerpc64
riscv64
sparc64
All sections
1 - General commands
2 - System calls
3 - Library functions
3p - Perl library
4 - Device drivers
5 - File formats
6 - Games
7 - Miscellaneous
8 - System manager's manual
9 - Kernel developer's manual