More than half of the 100 million patients of a US-based hospital interacted with their physicians online last year. IT services major Cognizant 's internet-of-things ( IoT ) solution made this happen using information from smartphones and other devices such as glucose meters.This is not a one-off example of adding value in services using IoT. Management consulting firm Zinnov said HCL Technologies used an IoT-based solution (built on Microsoft Azure platform) to enable remote monitoring of Chiller plants and that improved visibility into performance of installed base of chillers at one of its client's sites. This means the technology services company has helped its customers in the industrial sector provide better predictability of the machines and contain breakdowns.Technology services companies are likely to see IoT services market grow two-and-a-half times to $270 billion in five years (by 2023) from $106 billion now as they are seeing a sharp rise in effective implementation across factories, healthcare systems and others sectors, Zinnov said in a study."There have been large-scale deployments of IoT-enabled asset management in the manufacturing, technology, energy, utilities and healthcare sectors. Use cases in connected supply chain, logistics, fleet management and smart manufacturing are also growing because of the integration of edge computing (edge) -sensor, data acquisition systems with cloud, analytics and enterprise systems," said Jayraj Nair, vice-president and global head -IoT, Wipro Nair added that IoT adoption is significant in asset-intensive businesses that benefit from smart connected assets to achieve higher operational efficiency.Wipro, which earns more than 31% of its revenues from digital services, said adoption of connected and autonomous vehicle technologies is becoming mainstream. This apart, smart city and campuses, prominent examples of IoT, have started impacting the society, pointed out Nair.IoT services - which include business opportunities such as strategy & consulting, engineering, IoT system integration & deployment, and managed services & support - have seen 28% growth year-on-year fuelled by demand from across healthcare, retail, automotive and industrial fields .In Cognizant's case, Zinnov said, the company solved the healthcare firm's problem of creating remote patient monitoring system to ensure enhanced patient care and monitoring. The solution was built on Microsoft Azure IoT.Zinnov said more enterprises are investing in predictive maintenance through IoT to realise a host of benefits such as improved asset uptime, compliance adherence and better customer service."Enterprises are leveraging IoT and have transitioned from preventive maintenance to predictive maintenance," it said in the study. Infosys sees solutions for smart campuses, intelligent workspaces & sustainability, smart transportation, smart metering and smart farming among the key growth drivers in IoT .It, however, raised concerns saying "integration with legacy IT systems still remains a key impediment for enterprises looking to adopt IoT for predictive maintenance".Cognizant, which helps clients in designing, building of new age smart products, collecting usage information and health information of the assets, remotely managing assets as well as providing offering predictive maintenance, eyes faster growth in product and resources maintenance."We foresee rapid growth especially in the products and resources segment, that comprises manufacturing logistics, energy and utilities, automotive, retail, consumer goods. Health care and life sciences are also high-growth businesses for IoT technologies," said Madhuraj Jadhav, vice-president - connected products, Cognizant.Infosys sees solutions for smart campuses, intelligent workspaces & sustainability, smart transportation, smart metering and smart farming are among the key growth drivers in IoT."IoT is part of our digital transformation offerings for clients and is growing at a rapid pace. We expect Infosys' IoT service offerings to continue to add tremendous value to our clients in the short and mid-term," said Nitesh Bansal, senior vice-president and global head engineering services at Infosys.