The activities of Trans Tech Publications Inc. began back in 1967 when the first volume of the now famous "Diffusion Data" series was published. The series was later enlarged, and renamed "Diffusion and Defect Data", and this year it celebrated the publication of its 400th volume; a number which is now added to at the rate of 24 volumes per year.Since 1967 when the first volume of "Diffusion Data" was published, Trans Tech Publications Inc. has grown steadily and is now active in a wide range of disciplines:Materials Science and Technology is still our most important field of activity and the periodicals, "Materials Science Forum", "Key Engineering Materials", "Defect and Diffusion Forum" and "Solid State Phenomena", "Advanced Materials Research", "Applied Mechanics and Materials", "Journal of Nano Research" and "Advances in Science and Technology", offer more than 35,000 pages of high-class research results per year.Each one of these periodicals is available online in full text via our well-known www.scientific.net platform. The site currently features 10 periodicals and over 355,000 pages of highly scientific research.In 1998 we started our monograph series "Materials Science Foundations" which has since then published over 25 titles. Each monograph is treating its chosen topic exhaustively, and seeks in particular to draw together the strands of current theory and industrial practice.In order to serve the world's science and engineering community better, Trans Tech Publications Inc. - has established offices in Switzerland, the UK and the United States of America, and our products are available via numerous agents and distributors in all parts of the world.In all of the fields in which we are active, we pride ourselves on being well-accepted by our readers, authors and editors of conference proceedings alike.