内容简介：
Learn techniques used for the Linux, Macintosh and Windows operating systems in a quick and easy side-by-side format. Anyone from the beginner to the advanced can benefit by reading "What Was It? " There is something for everyone. Learn the language and structure of computing. Learn how to and what to look for when purchasing computers and peripherals. Learn how to format a hard drive and re-install an operating system. Detailed charts and examples throughout "What Was It? " will compare the similarities, differences and benefits of operating systems, computers and peripherals. Fear not the technology revolution. Gain insight and master the techniques.