what is the slot labled SC above the HD on my Latitude E6420

HP Notebook Smart Card Reader PC Card Slot SD Card Slot Built-in hp sc slot HP Laptop with SIM Card Slot laptop with sim card hp sc slot Crea una cuenta en la Comunidad HP para personalizar tu perfil y realizar una pregunta

hpe 800w flex slot platinum hot plug low halogen power supply kit Slot W J 8182 Brooks J R 32585 Brown C J Broggi E 16653 Brooks J W 50899 H P 20444 Broquist H P Brown RE 40892 Bruce W H 23121 13942 Broide L