For what is this slot ? : rcomputers

For what is this slot ? : rcomputers hp elitebook sc slot So I'm shopping around and I land at a HP laptop An HP Elitebook 1040 G3 The seller on ebay doesn't even mention anything about the SC slot hpp022 Predám notebook HP EliteBook 840 G5 s výkonným CPU Intel Core i7-8650u procesor Intel Core i7-8650U 2GHz, RAM: DDR4 8GB + voľný slot

hpp022 HP EliteBook 840 G7 14, Intel Core i7-10710U, 16 GB, 512 GB, CH Frage Auf der Seite hat es einen SC Slot

hp cache status problem detected p212 in slot 5 NEW Original For HP EliteBook 840 850 G5 G6 Smart Card Reader PC Card Slot 6050A2925801 100% Tested Fast Ship 1 sold Delivery  HP EliteBook 820 G1 Notebook PC