I was just trying to refresh my systems theory known from long ago, and I realized that I had forgetten the name of the basic functions. Specifically, what are the names of these functions respectively:
$$H(\Omega),~ H(\omega),~ H(s),~ H(z),~ |H(\Omega)|,~ |H(\omega)|,~ |H(s)|,~ |H(z)|$$
I'm assuming that $\Omega$ is the continuous frequency in radians, and $\omega$ is defined as the discrete frequency in radians.
I'm guessing that $H(\Omega)$ is the frequency response, and that $H(s)$ is the transfer function... but i'm not sure about the other names.