{{wiktionary|sip|Sip|SIP}} '''SIP''' or '''sip''' may refer to: {{TOC right}}

==Places== * Šip (Pale), Bosnia and Herzegovina * Šip (Višegrad), Bosnia and Herzegovina * Novi Sip, Serbia * Simferopol International Airport (IATA: SIP), an airport in Crimea * Suzhou Industrial Park, in Suzhou, China

==Business, finance, and economics== * Safety improvement plan, a plan for improving safety * Sales incentive plan, a type of employee incentive program * Securities information processor, the part of public infrastructure for disseminating market data in the United States * Share Incentive Plan, a UK government approved employee plan * Systematic investment plan, an investment strategy

== Communications and telephony== * Session Initiation Protocol (SIP), a communications protocol for signaling and controlling multimedia communication sessions, including voice over IP

===Networking=== * Service Improvement Plan, a former program to provide a defined level of basic telephone service to all Canadians * Standard Interchange Protocol, in library systems * System Information Packet, in the DMX512 standard for stage lighting control * Session Initiation Protocol, a signaling protocol most commonly used in Internet Telephony

===Software=== * SIP (software), a tool which generates C++ interface code for the programming language Python * Scilab Image Processing, an image processing toolbox * Soft Input Panel, on-screen input method for devices without standard keyboards <!--* System Idle Process, a process in Windows NT-based operating systems (fails WP:DABACRO)--> * Submission Information Packages, in the Open Archival Information System Reference Model; see Open Archival Information System#The OAIS environment and information model * System Integrity Protection, a security feature of macOS by Apple, starting with OS X El Capitan

===Semiconductors=== * Semiconductor intellectual property, a business model for licensing intellectual property * Single in-line package, for packaging electronic components * System in package, chip technology, also known as a chip stack multi-chip module * Silicon photonics, silicon semiconductor used as an optical medium

==Computing== * Social information processing, an activity through which collective human actions organize knowledge * Supplementary Ideographic Plane, a range of ideographic characters in the Unicode standard * Stochastic Information Packet, an array of simulation realizations

==Engineering== * Second-order intercept point, a measure of linearity in amplifiers and mixers * Shelter Implementation Plan, will help contain and manage the consequences of the Chernobyl disaster * Signature image processing, in welding fault detection * Sputter ion pump, a type of vacuum pump * Standard inspection procedure, a process for checking compliance * Sterilization-in-place, in sanitation of food preparation equipment * Structural insulated panel, a composite building material

==Enterprises== * SIP Animation, originally Saban International Paris, France based TV production company. * Société genevoise d'instruments physiques, Swiss manufacturer of precision machinery. * Société Immobilière Publique, a state-owned housing company in Burundi. * Società Italiana per l'Esercizio Telefonico (originally Società Idroelettrica Piemontese), the former name of Telecom Italia. * Selznick International Pictures, a defunct film studio. * SIP Strojna Industrija, Slovenian agricultural machinery manufacturer.

==Science and mathematics== * Semi-infinite programming, a type of mathematical optimization problem * Spectral induced polarisation, in geophysics * Stable-isotope probing, used in molecular biology * Statistically improbable phrases, a system used to find unique phrases for use as keywords * Stochastic Information Packet, in probability management, a representation of the probability distribution of a variable * Strongly implicit procedure, an algorithm for solving a sparse linear system of equations * Structure-inducing probes, a peptide synthesis to stabilize long peptides

==Other uses== * "Sip", a song from ''Joeboy'' * Stranka Ivana Pernara, a Croatian political party * Shelter-in-place, an emergency procedure * Sip (kinship) * Sip or Zip, one of the 18 months of the Haab', a part of the Maya calendric system * SIP Grenade, self igniting phosphorus * The Society of International Photographers, a not-for-profit organization founded in 1936 * Soviet Interview Project, a research project conducted in the early 1980s * ''Strangers in Paradise'', an award-winning comic book * State Implementation Plan, a United States state plan for complying with the federal Clean Air Act * Sub-irrigated planter, a type of gardening container * Sip as in SipSipStefan * "Sip", a 2017 song by Chris Brown from ''Heartbreak on a Full Moon''

==See also== * {{intitle|Sip}} * Social information processing (disambiguation) *Stranger in Paradise (disambiguation)

{{disambiguation}} mk:SIP