CAD Overlay CAD Overlay CAD Overlay is a commercial software application for raster-to-vector translation in 2D computer-aided design (CAD) and drafting — available between 1988 and 1996 as a third-party application for AutoCAD and other CAD systems. Developed and marketed by Image Systems Technology, CAD Overlay was first released in January 1988 running on AutoCAD Version 2.6. CAD Overlay replaced the previous generation of automatic raster-to-vector translation systems by embedding scanned documents and images directly in the CAD system. CAD Overlay was derived from a custom AutoCAD application developed using the Nth Engine graphics board in 1987 by David Chassin for Image
Computer-assisted personal interviewing may be because wearing headphones increases the insulation of the respondent for external stimuli, and also may be explained by the fact that the recorded human voice in the audio component evokes a more personalized interaction between the respondent and the instrument. Computer-assisted interviewing methods such as CAPI, CATI, or CASI, have been the focus of systematic reviews on the effects of computer-assisted interviewing on data quality. Those reviews indicate that computer-assisted methods are accepted by both interviewers and respondents, and these methods tend to improve data quality. In a study that compared Audio-CASI with paper SAQs and Video-CASI, researchers