OR

the simplex algorithm:

http://www.4shared.com/file/103764560/bfc099ec/TheSimplexAlgorithm.html

the transportation model:

http://www.4shared.com/file/103765338/705dfe4c/Transportation_Pbm.html

the assigment problem:

http://www.4shared.com/file/104533881/83c43feb/assigment_problem__Algorithm.html