One of a series of three resource guides concerned with communication, control, and computer access for disabled and elderly individuals, the directory focuses on communication aids. The book's six chapters each cover products with the same primary function. Cross reference indexes allow access to listings of products by function, input/output features, and by computer model. Switches are listed separately by input/output features. Provided for each product is usually an illustration, the product name, vendor, size, weight, power source, cost, and a description. The first chapter covers speech aids (prosthetic and orthotic aids to oral speech, such as artificial larynges and speech amplifiers); the second covers pointing and typing aids (headsticks, mouthsticks, handsplints, lightbeam headpointers, and other devices for facilitating an individual's ability to point or press keys); the third describes electronic training and communication initiation aids; the fourth reviews non-electronic communication aids; the fifth covers electronic communication and writing aids; and the last chapter considers telecommunication devices for the deaf (TDD's)--devices specifically designed for deaf individuals to communicate over phone lines using ASCII, Baudot, touchtones, or synthetic speech. Appendixes include a list of additional sources of information, a glossary, addresses of manufacturers listed with their products, and an alphabetical listing of all products in the three-book series. (DB)