A. General Introduction.- 1 Some aspects of language processing revealed through the analysis of acquired aphasia: The lexical system.- B. Reading Introduction to Section of Reading.- 2 Reading mechanisms and the organization of the lexicon: Evidence from acquired dyslexia.- 3 The role of the (output) phonological buffer in reading, writing, and repetition.- 4 The analysis of morphological errors in a case of acquired dyslexia.- 5 General to specific access to word meaning: A claim reexamined.- C. Writing Introduction to Section on Writing.- 6 Aspects of the spelling process: Evidence from a case of acquired dysgraphia.- 7 Dissociation of spelling errors in written and oral spelling: The role of allographic conversion in writing.- 8 The role of the Graphemic Buffer in spelling: Evidence from a case of acquired dysgraphia.- 9 Orthographic structure, the graphemic buffer and the spelling process.- D. Speaking Introduction to Section on Speaking.- 10 Dissociation of inflectional and derivational morphology.- 11 A Case of Selective Deficit to Positional Level Processing.- 12 Variation in the pattern of omissions and substitutions of grammatical morphemes in the spontaneous speech of so-called agrammatic patients.