Useful technology links

Need to troubleshoot Windows, learn a programming language or check a database command? These seven official computing and security resources include practical guidance to help you choose where to start. They complement the tutorials on Todo sobre informática: you do not need to read them all, just choose the resource that fits your task.

Selection reviewed on 30 September 2026. The destination language is noted for each resource.

Troubleshoot Windows

Microsoft Support

Use the manufacturer's guidance for Windows updates, devices, networking and recovery. If a printer stops responding, for example, start with the devices or troubleshooting category. Before following a guide, check which Windows version it covers and write down the exact error message: a solution for a different symptom may not help. Language: English.

Learn programming and web development

MDN Web Docs

The learning area organizes the foundations of web development. It is a starting point for understanding page structure with HTML, presentation with CSS and behavior with JavaScript. If you are new to the subject, work through the introductory modules and try the examples on a local page before changing your published website. Language: English.

Python

The official Python 3 tutorial covers the interpreter, data structures, functions, modules and errors. It is particularly useful if you already understand basic programming concepts and want to learn this language. Start with small examples and test files; do not use important documents as the first input to a script. Check the version selector. Language: English.

PHP

The official manual provides a reference for PHP syntax, functions, configuration and application security. When you encounter an unfamiliar function, check its parameters, return value and version requirements before copying an example. Distinguish the documentation from user-contributed notes and check the PHP version installed on your hosting service. Language: English.

Check database documentation

PostgreSQL

This index brings together manuals by version. Use it to check SQL syntax and options for tools such as pg_dump and pg_restore. Choose the documentation for your installation: the “current” option may describe a different version. If you are preparing a restore, rehearse with a test database and keep the original backup. Language: English.

Oracle Database

The portal organizes installation, administration, development and error documentation by version. Use it to check a command from our tutorials against your environment's requirements. Identify your Oracle version first, then search for the command or complete error code; do not assume that permissions and options are identical across versions. Language: English.

Recognize scams and improve online safety

INCIBE

The Citizens section of Spain's National Cybersecurity Institute publishes alerts and educational material on fraud, impersonation and account protection. It can help you recognize warning signs in email, text messages or WhatsApp conversations. The examples and assistance services focus on Spain; if you live elsewhere, check your local support channels. Language: Spanish.

How to use this selection

• Choose by task. For an error, note the product, version and complete message. To learn, start with a tutorial; to check a parameter, use the reference documentation.
• Check the context. Even an official guide may describe a version different from yours. Read requirements and warnings before installing software, deleting files or restoring data.
• Practice safely. Use test data, keep a copy of important files and never publish passwords or personal information when asking for help.

This selection prioritizes documentation from the projects themselves and institutional resources related to the site's topics. It is not a ranking and does not imply a partnership with the linked organizations. Destinations may change after this review.

For examples on this site, explore our software tutorials, database tutorials and security tutorials.

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