Environmental Protection. Didymo (Didymosphenia geminata), also known as rock snot, is a non-native invasive microscopic algae (diatom) that can produce large amounts of stalk material to form thick brown mats on stream bottoms. Didymo threatens aquatic habitat, biodiversity and recreational opportunities.
peripheral device - (computer science) electronic equipment connected by cable to the CPU of a computer; disk drives and printers are important peripherals.
The Definition of Input Devices. Input devices are hardware components that enable users to interact with a computer. Without input devices, you would not be able to feed instructions to a computer. The most common input devices in modern computers are the mouse (or pointing device), the keyboard, the scanner, the webcam and the microphone. Another input device, serving a niche purpose, is the joystick, used in gaming.