Unified Software Process
The Unified Software Development Process or Unified Process is an iterative and incremental software development process framework. The best-known and extensively documented refinement of the Unified Process is the Rational Unified Process (RUP). Other examples are OpenUP and Agile Unified Process.
The Unified Process is not simply a process, but rather an extensible framework which should be customized for specific organizations or projects. The Rational Unified Process is, similarly, a customizable framework. As a result, it is often impossible to say whether a refinement of the process was derived from UP or from RUP, and so the names tend to be used interchangeably.
The name Unified Process as opposed to Rational Unified Process is generally used to describe the generic process, including those elements which are common to most refinements. The Unified Process name is also used to avoid potential issues of trademark infringement since Rational Unified Process and RUP are trademarks of IBM. The first book to describe the process was titled The Unified Software Development Process(ISBN 0-201-57169-2) and published in 1999 by Ivar Jacobson, Grady Booch and James Rumbaugh. Since then various authors unaffiliated with Rational Software have published books and articles using the name Unified Process, whereas authors affiliated with Rational Software have favored the name Rational Unified Process.
In 2012 the Disciplined Agile Delivery framework was released, a hybrid framework that adopts and extends strategies from Unified Process, Scrum, XP, and other methods.
RUP
The Rational Unified Process (RUP) is an iterative software development process framework created by the Rational Software Corporation, a division of IBM since 2003.[1] RUP is not a single concrete prescriptive process, but rather an adaptable process framework, intended to be tailored by the development organizations and software project teams that will select the elements of the process that are appropriate for their needs. RUP is a specific implementation of the Unified Process.
Bibliography
Kruchten, Philippe (2004). The Rational Unified Process: An Introduction (3rd Ed.). ISBN 0-321-19770-4.
https://www.techopedia.com/definition/3885/unified-process-up
Scott, Kendall (2002). The Unified Process Explained. ISBN0-201-74204-7
Bergstrom, Stefan; Raberg, Lotta (2004). Adopting the Rational Unified Process: Success with the RUP. ISBN0-321-20294-5
Juan Torres Blog 