;HTTP: HyperText Transfer Protocol = the foundation of data communication for the World Wide Web. See HTML
;HTTPS: HTTP Secure = HTTP using SSL or the newer TLS
;IANAL: I Am Not A Lawyer = (but I'll play one on the Internet ;-)) Because this acronym can be interpreted as crude, Heather Meeker suggests an alternative 'disclaimer' in online discussions: "If this were legal advice, it would have come with an invoice."
;IAST: Interactive Application Security Testing. A technique employing an agent inside a running application capable of testing all libraries, frameworks, API endpoints and protocols for security vulnerabilities.
;IETF: Internet Engineering Task Force = organization to make the Internet work better
;IRL: In Real Life = A TLA used when 'virtual' was a thing. Now the virtual has permeated 'meat space' and so the two are not so distinct.
;ISBN: International Standard Book Number = 10-digit or 13-digit codes used by the publishing industry to uniquely identify individual book titles and editions. Some 10-digit ISBNs may end with an "X" instead of a digit.
;ISO 270001: [[wp:ISO/IEC 27001]] is an international standard to manage information security. The standard was originally published jointly by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC) in 2005, revised in 2013, and again most recently in 2022. There are also numerous recognized national variants of the standard. It details requirements for establishing, implementing, maintaining and continually improving an information security management system (ISMS) – the aim of which is to help organizations make the information assets they hold more secure. Organizations that meet the standard's requirements can choose to be certified by an accredited certification body following successful completion of an audit. The effectiveness of the ISO/IEC 27001 certification process and the overall standard has been addressed in a large-scale study conducted in 2020.
;JS: JavaScript = A computer language.
;JSON: JavaScript Object Notation = A data representation format in JavaScript
;LXD: is a next generation system container manager. It offers a user experience similar to virtual machines but using Linux containers instead.
;MOTD: Message Of The Day = [[MOTD]]
;NIST: (the US) National Institute of Standards and Technology
;NIST Cybersecurity Framework: [[wp:NIST Cybersecurity Framework]] is a set of guidelines for mitigating organizational cybersecurity risks, published by NIST based on existing standards, guidelines, and practices. The framework "provides a high level taxonomy of cybersecurity outcomes and a methodology to assess and manage those outcomes", in addition to guidance on the protection of privacy and civil liberties in a cybersecurity context. It has been translated to many languages, and is used by several governments and a wide range of businesses and organizations.
;node:
;nodes:A worker machine in a [[Kubernetes]] cluster.
;SCM: Software Configuration Management
;SEO: Search Engine Optimization
;SOC 2: Systems and Organization Controls (SOC) 2 is a set of compliance criteria developed by the American Institute of Certified Public Accountants (AICPA).
;SPAM: unsolicited bulk email
;SPF: Sender Policy Framework