Preface. 50 Years of Studia Editorial Introduction; V.F. Hendricks, J. Malinowski. Polish Logic in Post-war Period; V.R. Wójcicki, J. Zygmunt. Fifty Changes and Constants in Logic; J. van Benthem. Generalized Matrices in Abstract Algebraic Logic; J.M. Font. Intensional Logic Beyond First Order; M. Fitting. Questions of Canonicity; R. Goldblatt. Lukasiewicz Logic and Chang's MV Algebras in Action; V. Marra, D. Mundici. Substructural Logics and Residuated an Introduction; H. Ono. Quantum Computational A Survey; M.L. Dalla Chiara, R. Giuntini, R. Leporini. Inconsistent Issues Technical and Philosophical; G. Priest. Inconsistency-tolerant Description Motivation and Basic Systems; S.P. Odintsov, H. Wansing. Type Logics in Grammar; W. Buszkowski.