Overview

The quaternary sector is a way of grouping parts of an economy that produce, process and manage information rather than tangible goods. It is often described as the stage that follows primary (raw materials), secondary (manufacturing) and tertiary (services) sectors. Emphasizing knowledge, intellectual activity and technological processes, the quaternary sector includes work that creates and distributes information and ideas rather than physical products.

Key characteristics

Activities in this sector are typically high‑skill and information‑intensive. Common features include strong reliance on human capital, intellectual property, digital infrastructure and advanced technology. Outputs are frequently intangible: data, designs, software, research findings, policy advice and digital services. Employment tends to be concentrated in urban centres, research parks and technology clusters.

Typical components and examples

  • Information technology and cloud-based services — for example, cloud computing and managed data platforms (cloud services).
  • Research and development, including scientific research, applied R&D and innovation activities (research and development).
  • Data analytics, software development, digital media, financial analysis, design and professional consulting.
  • Higher education, publishing and intellectual property management.

History and development

The notion of a quaternary sector emerged in the late 20th century as economies shifted from manufacturing toward services and then toward information and knowledge production. Advances in computing, telecommunications and transport enabled firms to store, process and transmit information at scale, making knowledge work a distinct and increasingly valuable category within advanced economies.

Uses, importance and policy relevance

Classifying economic activity as quaternary helps policymakers and businesses identify sectors with high growth potential, high value added and strong links to innovation. Investment priorities often include education, R&D funding, broadband and digital infrastructure, because these underpin quaternary activities. For workers, the sector offers opportunities for specialized, well‑paid roles but also demands continuous skill upgrading.

Distinctions and notable points

The quaternary sector overlaps with the tertiary sector (services) and sometimes with a separate quinary category that covers top‑level decision‑making and nonprofit leadership. Definitions vary by context: some frameworks integrate quaternary activities within broader service classifications, while others treat knowledge industries as a distinct fourth sector. Regardless, the label highlights the economic shift toward information, innovation and intangible value.