Has a reliable estimate been released?
I have heard estimates that some 2 billion passive ultrahigh-frequency (UHF) tags were sold in 2014, and I would imagine that at least that many passive high-frequency (HF) tags were sold as well. RFID Journal does not track sales of equipment, but companies such as Venture Development Corp. (VDC Research), Frost & Sullivan and ABI Research do, and they could probably provide you with an estimate.
—Mark Roberti, Founder and Editor, RFID Journal
Do Any ERP Systems for Schools Have RFID Features? »