'''IBM Security i2 Analyst's Notebook''' is a software product from [[IBM]]i2 Group for data analysis and investigation. Based on ELP (entity-link-property) methodology, it reveals relationships between data entities to discover patterns and provide insight into data. It is commonly used by digital analysts at law enforcement, military and other government intelligence agencies, and by fraud departments. It is a part of the [[Human Terrain System]], a [[United States Army]] program which embeds social scientists with combat brigades. Several investigations, including an investigation into fraud in the U.S. Army, are reported to have used it.<ref>{{Citation |first=Joab |last=Jackson | url = http://gcn.com/articles/2009/07/14/army-procurement-fraud-detection.aspx | title = Army employs visualization software to uncover procurement fraud | date = 14 July 2009 | newspaper = [[Government Computer News]]}}.</ref> It is also used by Swedish police to analyse social contacts and social networks.<ref name="nt-20131106">{{Citation | first = Monica | last = Kleja | url = http://www.nyteknik.se/nyheter/it_telekom/allmant/article3784822.ece|title=Säpos krav: Flöden från operatörerna | newspaper = [[Ny Teknik]] | date = 6 November 2013 | accessdate = 26 September 2015|language=swedish}}</ref>{{Not in citation |date= July 2015}}
IBM acquired i2 Analyst's Notebook when it bought the [[i2 Limited|i2 Group]].<ref>{{Cite web|last=Jackson|first=Joab|date=2011-08-31|title=IBM to acquire i2 for criminal mastermind software|url=https://www.computerworld.com/article/2510873/ibm-to-acquire-i2-for-criminal-mastermind-software.html|access-date=2021-02-26|website=Computerworld|language=en}}</ref>
