This section of the article provides an overview of the second volume of the "Théorie des Topos et Cohomologie Étale des Schémas" (SGA 4), a collection of informal reports and seminars edited by A. Dold and B. Eckmann. The work is part of the Université de Nice, Faculté des Sciences series and is advised by J. Dieudonné. It covers topics in algebraic geometry, specifically focusing on topos theory and étale cohomology of schemes. The volume includes presentations by M. Artin, A. Grothendieck, J.L. Verdier, N. Bourbaki, P. Deligne, and B. Saint-Donat. The second volume (Tome 2) contains presentations V to VIII, covering subjects such as cohomology in toposes, descent techniques, conditions of finiteness, étale sites and toposes, and the study of finite morphisms in cohomological terms. The section also includes a terminological index and a notation index.This section of the article provides an overview of the second volume of the "Théorie des Topos et Cohomologie Étale des Schémas" (SGA 4), a collection of informal reports and seminars edited by A. Dold and B. Eckmann. The work is part of the Université de Nice, Faculté des Sciences series and is advised by J. Dieudonné. It covers topics in algebraic geometry, specifically focusing on topos theory and étale cohomology of schemes. The volume includes presentations by M. Artin, A. Grothendieck, J.L. Verdier, N. Bourbaki, P. Deligne, and B. Saint-Donat. The second volume (Tome 2) contains presentations V to VIII, covering subjects such as cohomology in toposes, descent techniques, conditions of finiteness, étale sites and toposes, and the study of finite morphisms in cohomological terms. The section also includes a terminological index and a notation index.