This document discusses various computer input devices. It describes audio visual devices like scanners, digital cameras, and webcams that can input images and video. Optical devices for data storage are discussed like CD-ROMs, DVDs, and drives. Pointing devices are also covered, including mice, joysticks, touchpads, keyboards, and touchscreens. For each device type, examples are given and their functions and advantages/disadvantages are summarized. The document aims to inform the reader about different types of hardware that can provide data and input to computers.