**Caroline M. Halliday** is an electrical engineer with High Tech Aid in the Chicago area. Her company specializes in technical documentation and teaching for the PC environment. She has a Bachelor of Science (Hons) degree from the University of Manchester, England, and is a former technical editor for *PC Tech Journal*. She is coauthor of [IBM PS/2 Technical Guide](/works/OL3008928W/), published by Howard W. Sams and Co., and the principal author of [Using OS/2](/works/OL3008934W/), published by Que Corporation. She now contributes articles to various magazines including *PC Week* and *Byte*. — [MS-DOS: Userʼs Guide](/works/OL18173637W/)