One of nine brief guides for special educators on using computer technology, this guide focuses on access including adaptations in input devices, output devices, and computer interfaces. Low technology devices include "no-technology" devices (usually modifications to existing devices), simple switches, and multiple switches. High technology input devices include advanced switches, video pointing devices, modified keyboards, alternative keyboards, voice recognition devices, and optical character readers. Among output devices are non-computer-dependent or computer-dependent devices (including print enlargers, braillers, and light/sound transmitters) and speech synthesizers. Interfaces used to connect various devices with the computer are briefly discussed. Listed are six readings, four low technology devices, four advanced switches, two video pointing devices, two modified keyboards, four alternative keyboards, two voice recognition devices, one optical character reader, five non-computer-dependent output devices, four computer-dependent output devices, four speech synthesizers, three computer interfaces, and a video. (DB)