is a book on computer programming by Introduction to Algorithms Thomas H. Cormen, Charles E. Leiserson, Ronald L. Rivest, and Clifford Stein. The book has been widely used as the textbook for algorithms courses at many universities and is commonly  cited as a reference for algorithms in published papers, with over 10,000 citations documented on CiteSeerX. The book sold half a million copies during its first 20 years.  Its fame has led to the common use of the abbreviation "  CLRS" (Cormen, Leiserson, Rivest, Stein), or, in the first edition, " CLR" (Cormen, Leiserson, Rivest).
In the preface, the authors write about how the book was written to be comprehensive and useful in both teaching and professional environments. Each chapter focuses on an algorithm, and discusses its design techniques and areas of application. Instead of using a specific programming language, the algorithms are written in
pseudocode. The descriptions focus on the aspects of the algorithm itself, its mathematical properties, and emphasize efficiency.
The first edition of the textbook did not include Stein as an author, and thus the book became known by the initialism CLR. It included two chapters ("Arithmetic Circuits" & "Algorithms for Parallel Computers") that were dropped in the second edition. After the addition of the fourth author in the second edition, many began to refer to the book as "CLRS". This first edition of the book was also known as "The Big White Book (of Algorithms)." With the second edition, the predominant color of the
cover changed to green, causing the nickname to be shortened to just "The Big Book (of Algorithms)." A third edition was published in August 2009. The fourth edition will be released in March 2022 
 Cover design
mobile depicted on the cover, Big Red (1959) by Alexander Calder, can be found at the Whitney Museum of American Art in New York City.  An Introduction to Language by Fromkin also uses Calder's mobile on its cover.
Table of contents
1 The Role of Algorithms in Computing
2 Getting Started
3 Growth of Functions
5 Probabilistic Analysis and Randomized Algorithms II Sorting and Order Statistics
8 Sorting in Linear Time
9 Medians and Order Statistics III Data Structures
10 Elementary Data Structures
11 Hash Tables
12 Binary Search Trees
13 Red-Black Trees
14 Augmenting Data Structures IV Advanced Design and Analysis Techniques
15 Dynamic Programming
16 Greedy Algorithms
17 Amortized Analysis V Advanced Data Structures
19 Fibonacci Heap
20 Van Emde Boas Trees
21 Data Structures for Disjoint Sets VI Graph Algorithms
22 Elementary Graph Algorithms
23 Minimum Spanning Trees
24 Single-Source Shortest Paths
25 All-Pairs Shortest Paths
26 Maximum Flow VII Selected Topics
27 Multithreaded Algorithms
28 Matrix Operations
29 Linear Programming
30 Polynomials and the FFT
31 Number-Theoretic Algorithms
32 String Matching
33 Computational Geometry
35 Approximation Algorithms VIII Appendix: Mathematical Background
B Sets, Etc.
C Counting and Probability
D Matrices Publication history
Cormen, Thomas H.; Leiserson, Charles E.; Rivest, Ronald L. (1990). Introduction to Algorithms (1st ed.). MIT Press and McGraw-Hill. ISBN 0-262-03141-8.
Cormen, Thomas H.; Leiserson, Charles E.; Rivest, Ronald L.; Stein, Clifford (2001) . Introduction to Algorithms (2nd ed.). MIT Press and McGraw-Hill. ISBN 0-262-03293-7. 12 printings up to 2009, errata:  Cormen, Thomas H.; Leiserson, Charles E.; Rivest, Ronald L.; Stein, Clifford (2009) . Introduction to Algorithms (3rd ed.). MIT Press and McGraw-Hill. ISBN 0-262-03384-4. 1320 pp., 5 printings up to 2016), errata:  References
Introduction to Algorithms. MIT Press. MIT Electrical Engineering and Computer Science. MIT Press. 18 June 1990. ISBN 9780262031417 . Retrieved . 2017-07-02
"Introduction to Algorithms—CiteSeerX citation query". . The College of Information Sciences and Technology at Penn State CiteSeerX . Retrieved . 2012-05-15
Larry Hardesty (August 10, 2011). "Milestone for MIT Press's bestseller". MIT News Office . Retrieved . August 16, 2011
"Eternally Confuzzled - Red/Black Trees". Archived from the original on 2014-11-29 . Retrieved . 2013-07-17
Cormen; Leiserson; Riverst; Stein (2009). "Preface". Introduction to Algorithms (3 ed.). Cambridge, Massachusetts: MIT Press. pp. xiii–xiv. ISBN 978-0-262-03384-8.
"V-Business Card". www.csd.uwo.ca.
Introduction to Algorithms. MIT Press. 22 March 2022. ISBN 9780262046305.
^ Cormen et al, back cover. See, also,
Big Red at the Whitney Museum of American Art web site.
"Introduction to Algorithms, Second Edition". www.cs.dartmouth.edu.
"Introduction to Algorithms, Third Edition". www.cs.dartmouth.edu.