This volume contains the proceedings of the 4th International Conference on Algorithmic Aspects in Information and Management (AAIM 2008), held June 23-25, 2008, at Fudan University, Shanghai, China. This conference is intended for original algorithmic research on immediate applications and/or fundam- tal problems pertinent to information management and management science, broadly construed. The ?rst three conferences were held in Xi'an (2005), Hong Kong (2006), and Portland (2007). Submissionstothisyear'sconferencewereconductedelectronically.Atotalof 53 papers were submitted from Algeria, Australia, Bangladesh, Canada, China, France, Germany, Iran, Ireland, Italy, Japan, Latvia, Mexico, Netherlands, UK, Ukraine, and the USA. Each paper was evaluated by three ProgramCommittee members from an international Program Committee (listed on the following pages), assisted in some cases by external reviews and comments. Eventually, 31 papers were accepted, but one paper was later withdrawn. In addition to these selected papers, the conference also included two invited keynote talks by Ding-Zhu Du (University of Texas at Dallas and Xi'an Jiaotong University, China) and Vijay V. Vazirani (Georgia Institute of Technology), and a special session on Fixed Parameter Tractable (FPT) algorithms by Mike Fellows, Rolf Niedermeier, Jianer Chen, and Michael Langston.

This book constitutes the refereed proceedings of the 16th Annual Conference on Theory and Applications of Models of Computation, TAMC 2020, held in Changsha, China, in October 2020. The 37 full papers were carefully reviewed and selected from 83 submissions. The main themes of the selected papers are computability, complexity, algorithms, information theory and their extensions to machine learning theory and foundations of artificial intelligence.