Seventh Mississippi State - UAB Conference on Differential Equations and Computational Simulations. Electronic Journal of Differential Equations, Conference 17 (2009), pp. 159-170. Title: Bounded solutions: Differential vs difference equations Author: Jean Mawhin (Univ. Catholique de Louvain, Belgium) Abstract: We compare some recent results on bounded solutions (over $Z$) of nonlinear difference equations and systems to corresponding ones for nonlinear differential equations. Bounded input-bounded output problems, lower and upper solutions, Landesman-Lazer conditions and guiding functions techniques are considered. Published April 15, 2009. Math Subject Classifications: 39A11, 39A12. Key Words: Difference equations; bounded solutions; lower-upper solutions; Landesman-Lazer conditions; guiding functions.