Short-tail keywords
A colloquial term for broad, popular queries near the head of the search distribution. Intent is often ambiguous; word count alone does not determine the category.
Definition and sourcesKNOWLEDGE / FROM A TO Z
Glossary
Technology, explained clearly. Find a term, choose a letter or narrow the topic. Definitions include sources and their review date.
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Clear filtersSilex
A historical PHP microframework based on Symfony components whose development ended. New deployments require a deliberate maintenance plan rather than assuming support.
Definition and sourcesSilverstripe CMS
A PHP CMS and framework for sites with modelled data. Maintenance covers core, extension and runtime compatibility.
Definition and sourcesSimple Machines Forum
Forum software with accounts, discussions and moderation. Deployment needs version, extension and user-data protection checks.
Definition and sourcesSingle opt-in
Subscription without an extra confirmation email step. It is simpler but does not verify address control through that additional step.
Definition and sourcesSingle-page application
An application updating its interface without full document reloads on every navigation. It needs deliberate handling of history, accessibility, data and indexing.
Definition and sourcesSite reliability engineering
Applying software engineering to reliability and operations. It includes service objectives, error budgets and reducing manual toil, not merely monitoring.
Definition and sourcesSitebulb
A technical website-audit and crawl-visualisation tool. Suggestions require contextual review; not every detected difference is a business defect.
Definition and sourcesSkippable in-stream ads
A historical term for skippable ads shown within video content. Check current Google Ads documentation for format and view-counting rules.
Definition and sourcesSMTP (Simple Mail Transfer Protocol)
A protocol for transferring email between servers and submitting messages from clients. Authentication and TLS use additional mechanisms. SMTP is not a mailbox-reading protocol and does not itself define encryption.
Definition and sourcesSMTP TLS reporting
A mechanism reporting secure-email-transport problems. It supports policy monitoring but does not itself enforce encryption or delivery.
Definition and sourcesSnapdragon
Qualcomm's brand of platforms and chips used in devices including phones and computers. CPU, graphics, modems and other components vary by model. The brand name alone establishes neither performance nor power consumption.
Definition and sourcesSnapshot
A point-in-time view of a resource. Application consistency and independence depend on the mechanism; snapshots do not always replace backups.
Definition and sourcesSngine
A commercial script for building social networks. Evaluate features, updates and add-on rights against its specific version and licence.
Definition and sourcesSOAP
A messaging protocol using XML structure and envelopes. It can use different transports and is not synonymous with every HTTP API.
Definition and sourcesSoC (System on a Chip)
A chip integrating multiple system functions, such as CPU, GPU and controllers. Components vary by design. RAM or a modem may remain separate; not every system component must share one chip.
Definition and sourcesSocial media
Platforms and tools for publishing content and interaction between users. They support business communication, communities and advertising. Visibility depends on platform rules and audiences; a profile alone does not guarantee customer reach.
Definition and sourcesSocial media optimisation
Improving profiles and content for social-media use and sharing. It should serve audiences; hashtags alone do not constitute a strategy.
Definition and sourcesSoft bounce
A temporary email-delivery problem such as a full mailbox. Providers may retry; persistent problems require contact-quality review.
Definition and sourcesSoftware bug
A defect causing software to behave contrary to requirements or expectations. A fix should address the cause and verify the problem does not recur.
Definition and sourcesSoftware development lifecycle
The software lifecycle covering needs, design, implementation, testing and maintenance. Stages can repeat; launching the product does not end the lifecycle.
Definition and sourcesSolana
A blockchain network supporting transactions and programs, with SOL as its native asset. It has its own architecture and consensus mechanisms. Costs and speed depend on network conditions; comparisons need shared criteria.
Definition and sourcesSolid-state drive
Storage based on semiconductor memory without spinning platters. Interface, controller and memory type affect performance; SSD does not automatically mean NVMe.
Definition and sourcesSpear phishing
A targeted phishing attempt tailored to a person or organisation. Knowing a name or work context does not establish sender authenticity.
Definition and sources