Which innovative feature was first widely introduced in restaurant POS systems during the early 2000s that significantly changed how servers took customer orders?

Restaurant technology has transformed dramatically over the decades, particularly in how orders are processed and payments are collected. Modern point-of-sale (POS) systems have revolutionized restaurant operations with features from inventory management to customer loyalty tracking. Test your knowledge about the history and development of food service POS technology!

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Handheld tableside ordering devices that wirelessly transmitted orders to the kitchen
Voice-recognition software that allowed servers to speak orders directly into the system
Customer-facing tablets that allowed diners to place orders themselves without server assistance
Biometric fingerprint authentication for servers to access their specific orders and tables