This publication contains all the papers presented at the first International DIANA Conference on Computational Mechanics. Nearly all papers show the results of calculations achieved with the DIANA TM Finite Element System. Broadly, the book follows the line of research from the material level, via the element level, to the structural level. But it should be emphasized that much current research passes from one level to the other, and such an interaction is also reflected here. The following domains are treated: (hyper)elasticity, (visco)plasticity and cracking; (enriched) damaging continua models; material experiments vs. computational models; stochastic approaches; fluid-structure interactions; element technology; geometrical nonlinearity and structural instability; nonlinear dynamics; solution procedures.