# SIP

SIP or sip may refer to:

## 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
* 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 OS X El Capitan by Apple

### 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