And I quote:

Thus, for example, read “munger(1)” as “the ‘munger’ program, which will
be documented in section 1 (user tools) of the Unix manual pages, if it’s present on your system”. Section 2 is C system calls, section 3 is C library calls, section 5 is file formats and protocols, section 8 is system administration tools. Other sections vary among Unixes but are not cited in this book. For more, type man 1 man at your Unix shell prompt.

The Art of Unix Programming.

Emacs & case

I know it's basic knowledge for all ya emacsers. Nevertheless, I'm always amused when I re-find something I totally forgot! Like today, when I had to convert a buncha constants to uppercase in some action script code. As always emacs have the answer to your problems: Emacs & Casing

Thats M-u & M-l ok?