Issue no. 1 Table of Contents

Définition algébrique des cellules non strictes
Weak homotopy equivalences of mapping spaces and Vogt's lemma

Issue no. 2 Table of Contents

Toute théorie est algébrique et topologique
A note on Kieboom's pullback theorem for cofibrations
Fifty years of research
The “Cahiers” on internet
TAC : Theory and Applications of Categories

Issue no. 3 Table of Contents

Foreword
The Mal'tsev operation on extensions
A universal construction in Goursat categories
On clones determined by their initial segments
Injectivity versus exponentiability

Issue no. 4 Table of Contents

On filtered weighted colimits of presheaves
Tychonoff products of super second countable and super separable metric spaces
Profinite relational structures
On synchronized relatively full embeddings and 𝒬-universality
Protomodular quasivarieties of universal algebras