RATU303 RTP SLOT 19 or more expansion cards can be installed in backplane systems. Daughterboards are sometimes used in computers in order to allow for expansion cards to fit parallel to the motherboard, usually to maintain a small form factor. These usually fit on top of and parallel to the board, separated by spacers or standoffs, and are sometimes called mezzanine cards due to being stacked like the mezzanine of a theatre. As mentioned, the USB model is preserved, and generally minor adjustments made to fit the specific needs of a wireless system.|Saya Pilih Berlakon - Janna Nick