This eleventh volume in the series covering the latest results in the field includes abstracts of papers which have appeared since the publication of Annual Retrospective X (Volumes 280-281). As well as the 589 ceramics abstracts, the issue includes original papers on all of the major material groups, and theory: βPositron Annihilation in Ion-Implanted ZnOβ (A.D.Acharya, G.Singh and S.B.Shrivastava), βOptical Characteristics of Tungsten Oxide Thin Films Prepared by Sputtering Techniqueβ (S.A.Aly), βResearch on Magnetization Mechanism of Nano-Magnetic Fluidβ (J.Li and D.Li), βClustering of Arsenic Atoms in Silicon during Low-Temperature Annealingβ (O.Velichko and O.Burunova), βEffect of Current Density on Composition and Microstructure of Si Diffusion Layer by Electrodepositionβ (H.Yang, Y.Zhang, Y.Li, G.Tang and K.Jia), βPositron Annihilation & Micro-Hardness Measurement of 6063 and 6066 with Compromise with Ingot Alβ (M.A.Abdel-Rahman, A.Al-deen and E.A.Badawi), βStress-Induced Migration and Trapping of Hydrogen in AISI403 Steelβ (G.P.Tiwari, V.D.Alur and E.Ramadasan), βElectromigration Force on a Proton with a Bound Stateβ (A.Lodder).