120 Wearable technology refers to electronic devices, often including sensors and microcontrollers, that are integrated into items worn on the body, such as smart watches, fitness trackers, and smart clothing. Cloud systems are named because the cloud symbol, in early network diagrams, similarly to how children draw clouds, represented the complex, abstract Internet infrastructure and remote servers that provided computing services. See unit 7.3. DIGITAL TOOLS Digital technology is now part of our life and is constantly evolving, both in terms of its devices and tools. Digital devices and tools Devices are the physical digital objects that we use, like computers, smartphones, tablets, laptops and even wearable technologies . They are the hardware that gives us access to the digital world. Digital tools are the programs, platforms, and systems that run on digital devices. They are not physical, but they allow us to perform tasks, manage information, and connect with others. Some digital tools Among the most used digital tools, there are: communication apps, productivity tools, shopping and banking tools, entertainment, informational, educational, and health apps, streaming services, gaming platforms, navigation and mobility tools, ONLINE RESOURCES Great tods: computers creative apps, collaboration platforms, safety and security tools. Other digital tools Web 4.0 is the latest version of the Internet. It focuses on customisation, context-awareness, and interaction between humans and machines. It uses artificial intelligence and realtime data to adapt to our needs, predict preferences, and offer more intelligent services. Cloud systems allow us to store, access, and process data from anywhere, without depending on a physical device. This allows for easy remote collaboration, smart work, and resource sharing. The Internet of Things refers to the connection of everyday objects to the Internet so that they can send, receive, and process data. It includes a wide range of applications: from health devices and wearable technology to smart cars and smart houses (domotics), connected factories, and entire cities that manage traffic or energy through digital systems. Big data is the enormous amount of information generated every second from connected devices, social networks, online services, and sensors. Big data systems are designed to collect, organise, and analyse this information to understand trends, improve services, and make more informed decisions. Artificial Intelligence (AI) refers to systems that can analyse information, recognise patterns, and make predictions. Its goal is to support human thinking with faster and more accurate processing. 272 PEOPLE AND INSTRUMENTS