Differences in spoken and written English appear at every level of the language; there are differences in phonology, morphology, vocabulary, and syntax, as well as differences in acceptability levels. This study contains four sections and an inventory of contrasting forms. Section One deals with domains and modalities including those discourse functions more appropriate to spoken or to written English, formality and register, cohesion and coherence, and topic change. The second section discusses properties, that is, communication channels and feedback, precision and economy, ellipsis, digression, and redundancy. Section Three examines phonology, typography, and punctuation. This discussion involves information units, the segmentation of words and sentences, typography and emotions, the syllable, and the influence of writing on speech. The final section analyzes vocabulary, including type and token differences, abbreviations, typography and spelling, and the matter of homophones and homographs. The inventory of forms provides a guide contrasting specific forms as they are realized in writing and speech. A glossary and a bibliography are also provided. (Author/AMH)