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.
Any device used in a computer system that is not. part of the essential computer, i.e., the memory and microÂ­. processor. Peripheral devices can be external such as a. mouse, keyboard, printer, monitor, external Zip. Â®. drive or scanÂ­. ner; or internal such as a CD-ROM drive, CD-R drive, or internal. modem.