Catalysis as a main category in our shelf classification is overdue for a long time. So far most books about catalysis were part of the group 28 I, a subcategory of 28 Interfaces, Surfaces, Thin Films, Colloids. Now we re-sorted all books with the shelf mark 28 I to the new group 27 Catalysis.

The new main category Catalysis includes:

27 Catalysis
A  General
C  Conference Proceedings (general)
E  Heterogeneous Catalysis
F  Applications
K  Kinetics
O  Homogeneous Catalysis
P  Preparation
S  Surfaces
T  Theory
U  Analytical Methods