James Richard "Jim" Jackson (May 16, 1924 - March 20, 2011) was an American

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 mathematician

Mathematician

A mathematician is a person whose primary area of study is the field of mathematics. Mathematicians are concerned with quantity, structure, space, and change....

, well known for his contribution to queueing theory

Queueing theory

Queueing theory is the mathematical study of waiting lines, or queues. The theory enables mathematical analysis of several related processes, including arriving at the queue, waiting in the queue , and being served at the front of the queue...

.

Jackson was born in Denver, CO and raised in Beverly Hills. He served in the United States Air Force

United States Air Force

The United States Air Force is the aerial warfare service branch of the United States Armed Forces and one of the American uniformed services. Initially part of the United States Army, the USAF was formed as a separate branch of the military on September 18, 1947 under the National Security Act of...

 during World War II

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

. After his service, he earned an A.B.

Bachelor of Arts

A Bachelor of Arts , from the Latin artium baccalaureus, is a bachelor's degree awarded for an undergraduate course or program in either the liberal arts, the sciences, or both...

 in 1946, an M.A.

Master of Arts (postgraduate)

A Master of Arts from the Latin Magister Artium, is a type of Master's degree awarded by universities in many countries. The M.A. is usually contrasted with the M.S. or M.Sc. degrees...

 in 1950 and a Ph.D.

Doctor of Philosophy

Doctor of Philosophy, abbreviated as Ph.D., PhD, D.Phil., or DPhil , in English-speaking countries, is a postgraduate academic degree awarded by universities...

 in 1952, with a thesis titled Abstract Function Spaces and Their Homotopy Theory. All of these degrees were from UCLA where Jackson remained in the School of Management for his career until his retirement in 1985.

While at University of California, Los Angeles

University of California, Los Angeles

The University of California, Los Angeles is a public research university located in the Westwood neighborhood of Los Angeles, California, USA. It was founded in 1919 as the "Southern Branch" of the University of California and is the second oldest of the ten campuses...

  he developed the Jackson's theorem and some of the first models that could predict the performance of networks with several nodes. Jackson's work was inspired by his experience in the Los Angeles

Los Ángeles

Los Ángeles is the capital of the province of Biobío, in the commune of the same name, in Region VIII , in the center-south of Chile. It is located between the Laja and Biobío rivers. The population is 123,445 inhabitants...

 aircraft industry, but the results found applications in the design of computers, manufacturing and the then emerging packet switched network

Packet switched network

A packet-switched network is a digital communications network that groups all transmitted data, irrespective of content, type, or structure into suitably sized blocks, called packets...

s, such as those undertaken by Leonard Kleinrock

Leonard Kleinrock

Leonard Kleinrock is an American engineer and computer scientist. A computer science professor at UCLA's Henry Samueli School of Engineering and Applied Science, he made several important contributions to the field of computer networking, in particular to the theoretical side of computer networking...

 in 1961.

He spent his retirement in Tehachapi, CA.