This article investigates the lexical and discourse features of English text and discourse with automated computer technologies. Specifically, this article examines the cohesion of English text and discourse with automated computer tools, Coh-Metrix and TEES. Coh-Metrix is a text analysis computer tool that can analyze English text and discourse on various linguistic and psycholinguistic measures of cohesion, readability, and language. Many researchers in the areas of applied linguistics, English education, and language psychology have now extensively used Coh-Metrix to analyze various English texts and textbooks. Recently, the author of this article has developed a new computer tool, TEES which can be applied to evaluate English texts and essays on various linguistic and psycholinguistic measures such as text readability, text cohesion, sentence structure, vocabulary, and text marker scores. Basically, TEES has been developed to evaluate English texts and essays in terms of a standardized norm. In the TEES system, a huge size of corpus was used to construct the standardized norm. This article introduces Coh-Metrix and TEES, and presents some research findings collected from Coh-Metrix studies.