Qualcomm technologies have powered the smartphone revolution and connected billions of people for over 30 years. Our technology is in virtually every smartphone in the world. We invented CDMA, pioneered 3G and 4G, and are leading the way to 5G and a new era of intelligent, connected devices. We are revolutionizing industries, including mobile, automotive, computing, IoT, health care and data center, across the globe, and enable millions of devices to connect with each other in ways never before imagined.
We engage in R&D, developing advanced technologies and products, and make those technologies broadly accessible to the whole digital communications ecosystem, ultimately enabling applications and services that consumers depend on. This model -- which is fundamental to the core mission, values and culture of Qualcomm -- has been in place since 1995, and ensures the market grows and consumers continually benefit.
Qualcomm Incorporated includes our licensing business, Qualcomm Technology Licensing (QTL), and the vast majority of our patent portfolio. Qualcomm Technologies, Inc., a subsidiary of Qualcomm Incorporated, operates, along with its subsidiaries, all of our engineering, research and development functions, and all of our products and services businesses, including, our Qualcomm CDMA Technologies (QCT) semiconductor business. QCT makes up approximately 60 percent of our revenue. QTL makes up approximately 40 percent of revenue.