Computer Science · Input-Output Devices
खुदरा (रिटेल) दुकानों में उत्पादों पर छपे यूनिवर्सल प्रोडक्ट कोड (UPC) को सीधे पढ़ने के लिए आमतौर पर किस डिवाइस का उपयोग किया जाता है?
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