Research Guides: Engineering Standards: Finding Standards on the Web

Internet Engineering Taskforce (IETF)
The standard body responsible for protocols governing the Internet, such as IPv6.
Third Generation Partnership Project (3GPP)
The organization is responsible for standards governing the evolution of GSM wireless networks.
European Telecommunications Standards Institute (ETSI)
An organization responsible for telecommunication standards in Europe, many of which become implemented globally. Provides free access to standards online.
International Telecommunication Union (ITU-T)
A United Nations agency responsible for telecom standards around the globe. Instrumental in the development of ISDN, Packet Layer protocols and OTN.
Comparison of Wireless Data Standards
This Wikipedia page provides an outline of wireless standards and the organizations responsible for them.
European Patent Office
An interesting resource providing access to 400 international standards and data on two million patents related to renewable energy. The standards database appears to be abstracts only, not full-text. The patent database is useful for generating brief landscape reports on patents classified in the CPC (Climate Change Mitigation Technologies classification). (Y02).
INSPIRE - International Standards & Patents in Renewable Energy
"Two million patents and 400 standards for renewable energy technology now accessible in one easy-to-use platform" - from IRENA website
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The INSPIRE platform provides a strategic window into the innovation and growth taking place in the renewable energy sector,” ...“It consolidates vast collections of renewable energy patents and standards, which can foster collaboration between innovators, spur improvement through product comparison and help identify partners by matching domestic energy needs to innovative energy solutions.” -

International Organization for Standardization
ISO creates documents that provide requirements, specifications, guidelines or characteristics that can be used consistently to ensure that materials, products, processes and services are fit for their purpose.

It has published 22448 International Standards, which can be bought from members or the ISO Store.
Espacenet
Espacenet offers free access to information about inventions and technical developments from 1836 to today.