UNIX, Linux, BSD and Solaris syscalls variations.
###Are there differences between the amount of syscalls in the major *NIX variants ?

<br>
###Which syscalls would be supported universally ?
UNIX, Linux, BSD and Solaris syscalls variations.
===

###Are there differences between the amount of syscalls in the major *NIX variants ?

<br>
###Which syscalls would be supported universally ?