Distributed.net: Project OGR - Describes the computerized effort to prove that the known shortest Golomb rulers (up to 25 marks) are really the shortest, or else find the actual shortest ones. Library of D-optimal Designs - Compiled by Jennifer Seberry. Design Resources - Links to resources for design theory maintained by Peter Cameron. Design Theory Lecture Notes on the Web - Links compiled by Peter Cameron. Design Theory Resource Server - A research project founded by the UK Engineering and Physical Sciences Research Council. Handbook of Combinatorial Designs - Home page for The CRC Handbook of Combinatorial Designs. Ted Spence's Home Page - Classification of Hadamard matrices and designs. La Jolla Covering Repository - A database of good covering designs constructed by Dan Gordon. Library of SBIBD - Compiled by Jennifer Seberry. Caps in Finite Geometries - Tables and examples in PG(k-1,q) by Yves Edel. Some Constant Weight Codes - As orbits of AG(2,q), PSL(2,2^f) and PGammaL(2,2^f) by Yves Edel. SOMA Update - Leonard Soicher reports on new SOMAs, which are generalisations of mutually orthogonal Latin squares. The Hadamard Maximal Determinant Problem - List of known {-1,1}-matrices with largest determinant and D-optimal designs. Blocks and Design Applet - Fractional factorial design generator by Marko Boon. Mathworld - Golomb Ruler - Description and theory, with references to additional reading. The Search for a Finite Projective Plane of Order 10 - By C.W.H. Lam. Orthogonal Arrays - Lists of orthogonal arrays, difference schemes and experimental design tools maintained by Warren F. Kuhfeld. Golomb Rulers - Table of lengths of shortest known Golomb rulers, counts of optimal and near-optimal rulers, and some Fortran programs for dealing with Golomb rulers. Golomb Rulers - Specification of the problem, research report, references, a solver program and some results. Orthogonal Arrays and Covering Arrays - Construction using permutation groups, by George Sherwood. Orthogonal Arrays - A library of over 200 orthogonal arrays maintained by N. J. A. Sloane. Hadamard Matrices - A library of Hadamard matrices maintained by N. J. A. Sloane.