The document discusses wearable computing. It begins with an introduction and overview of wearable computers and then discusses their history, aims, features, implementation, applications, advantages, and disadvantages. Key points include that wearable computers are portable devices that can be worn and allow hands-free use. They are integrated into everyday objects like watches. The document discusses examples of early wearable devices and outlines common components of wearable computers like input and output devices. It provides examples of uses in military and healthcare applications. The conclusion discusses challenges to wider adoption of wearable computers.