What is the SC card slot all about?

What is the SC card slot all about? hp sc slot Learn how to remove and replace the smart card reader board for HP EliteBook 740 G1 hp sc slot Slots 1 wedge-shaped lock slot 1 smart card reader slot 1 nano-SIM card slot Dimensions & Weight Depth: in Width:

hp sc slot Learn how to remove and replace the smart card reader board for HP EliteBook 740 G1

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