This document discusses the history and definitions of computer-assisted language learning (CALL). It notes that CALL dates back to the 1960s and was first introduced on university mainframe computers. It has evolved through three phases - behavioristic CALL in the 1950s-1970s, communicative CALL in the 1970s-1980s, and integrative CALL embracing multimedia and the internet in the 1990s. CALL encompasses issues of material design, technologies, and pedagogical theories. Materials can include purpose-made language learning programs as well as adaptations of existing computer-based resources.