CAD Overlay Integration Technology, a scanning service bureau in Schenectady, New York. In January 1988 Bob Godgart, David Chassin and Michael Mayernik formed Image Systems Technology in Troy, New York. The first version of CAD Overlay was demonstrated at A/E/C trade show in Chicago in May 1988. Subsequent versions include CAD Overlay ESP, CAD Overlay GSX, and CAD Overlay LFX. In 1995, Softdesk Inc. acquired Image Systems Technology and in 1996 Autodesk acquired Softdesk. CAD Overlay was subsequently rebranded as Autodesk CADOverlay. CAD Overlay CAD Overlay is a commercial software application for raster-to-vector translation in 2D computer-aided design (CAD) and drafting —
Computer-assisted language learning of corpora and concordancers, interactive whiteboards, Computer-mediated communication (CMC), language learning in virtual worlds, and mobile-assisted language learning (MALL). The term CALI (computer-assisted language instruction) was in use before CALL, reflecting its origins as a subset of the general term CAI (computer-assisted instruction). CALI fell out of favour among language teachers, however, as it appeared to imply a teacher-centred approach (instructional), whereas language teachers are more inclined to prefer a student-centred approach, focusing on learning rather than instruction. CALL began to replace CALI in the early 1980s (Davies & Higgins 1982: p. 3) and it is now incorporated into the