RankBrain is an artificial intelligence system that’s being applied to and used with Google’s current search engine algorithms to provide better results to user queries. Rooted in machine learning, RankBrain will use mathematical processes and an advanced understanding of language semantics to gradually learn more about how and why people search, and apply those conclusions to future search results.

A type of malware used for data kidnapping, in which the attacker encrypts the victim's data and demands payment for the decryption key. The program can be installed from an e-mail attachment, an infected program, or a compromised or malicious Web site. 

A concept that products can be developed faster and of higher quality. RAD usually embraces object-oriented programming methodology, which inherently fosters software re-use. 

A.k.a 3-D printing, stereolighography, or architectural modeling, is a printing process that uses layers to create a 3D object. Prototypes created with 3-D printers can be produced very quickly and are durable enough to use in functional testing.

RapidMiner is an open source platform for machine learning, data mining, text mining, predictive analytics and business analytics. RapidMiner empowers enterprises to easily mashup data, create predictive models and operationalize predictive analytics within any business process thus closing the loop between insight and action.

RAR is a proprietary archive file format that supports data compression, error recovery and file spanning. It was developed by a Russian software engineer, Eugene Roshal (the name RAR stands for Roshal ARchive) and the software is currently licensed by win.rar GmbH

The Raspberry Pi is a Credit Card sized single-board computer developed by the Raspberry Pi Foundationn. with an intention of promoting the teaching of basic computer science in schools. The Raspberry Pi is based on the Broadcom BCM2835 system on a chip (SoC), which includes an ARM1176JZF-S 700 MHz processor, VideoCore IV GPU, and was originally shipped with 256 megabytes of RAM, later upgraded (Model B & Model B+) to 512 MB. The system has Secure Digital (SD) or MicroSD (Model A+ and B+) sockets for boot media and persistent storage.

A hardware or combination hardware/software product that converts images described in the form of vector graphics statements into raster graphics images or bitmaps. 

Ratchet is an open-source front-end framework that helps you build highly interactive mobile web apps using simple and mobile-optimized HTML‚ CSS‚ and JavaScript components.

Rational Functional Tester is a tool for automated functional and regression testing of software applications from the Rational Software division of IBM. It is primariy allows QA teams to create tests that mimic the actions and assessments of a human tester.

Purify is a memory debugger program to detect memory access errors in programs written in C or C++. It allows dynamic verification a process by which a program discovers errors that occur when the program runs. The ability to detect non-fatal errors is a major distinction between Purify and similar programs from the usual debuggers. It is functionally similar to other memory debuggers, such as Insure++, Valgrind and BoundsChecker.

An advanced performance profiling tool that automatically pinpoints application performance bottlenecks quickly, taking the difficulty and guesswork out of performance tuning. Quantify works with  existing development tools—environments, editors and debuggers like Microsoft Visual Basic, Microsoft Visual C++ and Microsoft Visual J++, and is integrated with Microsoft Visual Studio 6.0.

An object-oriented Unified Modeling Language (UML) software design tool intended for visual modeling and component construction of enterprise-level software applications. 

IBM Rational® Test RealTime is a cross-platform solution for component testing and runtime analysis. It is designed for developers creating complex systems for embedded, real-time and other cross-platform distributed applications. This software helps you debug and correct errors before they go into production code.

An object-oriented and Web-enabled program development methodology. RUP is like an online mentor that provides guidelines, templates, and examples for all aspects and stages of program development. RUP and similar products.

RavenDB is a transactional, open-source Document Database written in .NET, that offers a flexible data model designed to address requirements coming from real-world systems. RavenDB allows you to build high-performance, low-latency applications quickly and efficiently. Data in RavenDB is stored schema-less as JSON documents, and can be queried efficiently using Linq queries from your .NET code or using RESTful API using other tools. Internally, RavenDB makes use of indexes which are automatically created based on your usage, or created explicitly by the consumer. RavenDB is built for web-scale, and offers replication and sharding support out-of-the-box.