From tools to computers
Technology includes simple tools as well as sophisticated digital systems. Improvements in materials, manufacturing, electricity and communications gradually created the foundations for modern computers and networks. Many technologies that now seem ordinary are the result of decades of incremental development rather than a single invention.
How computers represent information
Digital computers work with information represented using binary values. Software provides instructions for processing that information, while hardware supplies the physical components that perform the work. Modern devices combine processors, memory, storage, sensors and communication hardware into compact systems.
The internet and the web
The internet is a network of interconnected networks that allows devices to exchange data. The World Wide Web is one service that operates over the internet, using technologies such as web browsers, servers, URLs and HTTP. Keeping those ideas separate helps explain how websites and online services fit together.
Technology changes how we learn
Digital tools make it possible to practise skills, search reference material and receive immediate feedback. A quiz can be useful when it combines recall with explanations, because the learner can identify gaps and then investigate the underlying idea.
RAM, storage and software do different jobs
A processor follows instructions and performs calculations, while RAM holds information that programs need quickly while they are running. Storage such as an SSD keeps the operating system, apps and saved files even after the computer is switched off. RAM is usually temporary working space, whereas storage is intended to retain data. For example, opening an image editor loads parts of the program and the picture into memory; choosing Save writes the edited file to storage. This distinction explains why more RAM can help with many open apps without automatically increasing the amount of space available for photos and videos.
A practical example: what happens when you open a website
When you enter a web address, your browser uses the domain name to locate a server, sends a request and receives data such as HTML, stylesheets, images and scripts. The browser interprets those resources to display the page. The internet provides the underlying network connections; the web is one service that uses them. This distinction helps explain why a website can fail even when a device is connected to the internet. With an HTTPS address, the browser also establishes an encrypted connection to the website, helping to protect information in transit. That security connection does not, by itself, prove the website or the information on it is trustworthy. If a page fails to load, checking whether other websites work can help distinguish a problem with one site from a wider connection problem.
Further reading
These links provide further reading from established organisations, including subject explanations, source material and reference databases. They are not citations for every sentence in this guide.