Trygve Reenskaug
Trygve Reenskaug in 2010
Born (1930-06-21) June 21, 1930 (age 93)
Known formodel–view–controller, Object Oriented Role Analysis and Modeling, personal programming
Scientific career
FieldsComputer science
InstitutionsSentralinstitutt for industriell forskning, Xerox PARC, Taskon University of Oslo

Trygve Mikkjel Heyerdahl Reenskaug (born 21 June 1930) is a Norwegian computer scientist and professor emeritus of the University of Oslo.[1] He formulated the model–view–controller (MVC) pattern for graphical user interface (GUI) software design in 1979 while visiting the Xerox Palo Alto Research Center (PARC). His first major software project, "Autokon," produced a successful computer-aided designcomputer-aided manufacturing (CAD/CAM) program which was first used in 1963, and continued in use by shipyards worldwide for more than 30 years.

Reenskaug described his early Smalltalk and object-oriented programming conceptual efforts as follows:[2]

MVC was conceived as a general solution to the problem of users controlling a large and complex data set. The hardest part was to hit upon good names for the different architectural components. Model-View-Editor was the first set. After long discussions, particularly with Adele Goldberg, we ended with the terms Model-View-Controller.

He has been extensively involved in research into object-oriented methods and developed the Object Oriented Role Analysis and Modeling (OOram) and the OOram tool in 1983. He founded the information technology company Taskon in 1986, which developed tools based on OOram. The OOram ideas matured and evolved substantially into the BabyUML project, which culminated in creating the data, context and interaction (DCI) paradigm.

Reenskaug wrote the book Working With Objects: The OOram Software Engineering Method with co-authors Per Wold and Odd Arild Lehne.[3] Later he wrote a virtual machine for Unified Modeling Language (UML). As of 2005, he is professor emeritus of informatics at the University of Oslo.


  1. ^ Reenskaug, Trygve. "Welcome to the pages of Trygve M. H. Reenskaug". University of Oslo. Archived from the original on 25 April 2018. Retrieved 18 October 2022.
  2. ^ "MVC: Xerox PARC 1978-79". Archived from the original on 25 April 2018.
  3. ^ Reenskaug, Trygve; Wold, Per; Lehne, Odd Arild (June 1995). Working With Objects: The OOram Software Engineering Method (PDF). Prentice Hall. ISBN 978-0-13-452930-1. Archived from the original (PDF) on 25 April 2018. Retrieved 18 April 2010.