What is TEX/ITEX? A high-level programming language (and toolchain)for typesetting produces a lower-level language ·Less user-friendly The TEXbook v.s.WYSIWYG (e.g.,Microsoft Word) DONALD E.KNUTH Better flexibility ·TFX(by Knuth in1978) A品aY Commands are quite basic IATEX (by Leslie Lamport in 1986) A higher level language. A set of commands defined in terms of the underlying TeX commands E.g.,\usepackage{...},\documentclass{...}What is / ? A high-level programming language (and toolchain) for typesetting produces a lower-level language Less user-friendly v.s. WYSIWYG (e.g., Microsoft Word) Better flexibility (by Knuth in 1978) Commands are quite basic (by Leslie Lamport in 1986) A higher level language. A set of commands defined in terms of the underlying TeX commands E.g., \usepackage{...} , \documentclass{...} TEX LATEX TEX LATEX ` ` ` `