Is there reference manual for sh?

[John Levine]

>I need any online complete manual on sh, not a brief as it is man sh.
>The last one doesn't describe many features both interactive (command line 
>editing, using history interactively, and many others) 
>and scripting (for example, conditional expressions).

You're probably looking for the POSIX 1003.1 standard, Volume 2, which
is not available for free anywhere.

R's,
John