Diphtheria and tetanus are serious diseases caused by bacteria. Diphtheria causes a thick coating in the nose, throat, and airways. It can lead to breathing problems, paralysis, heart failure, or death.
Student Notes Page 1 of 7 K Aquilina Input Devices Input is any data or instructions entered into the memory of a computer. An input device is any hardware component that allows a user to enter data and instructions into a computer. The following is a list of the most common input devices which are nowadays found in a computer system. QWERTY Keyboard glossary pg. 129, 132 A keyboard contains keys that allow a user to enter data and instructions into the computer. All computer keyboards have a typing area that includes the letters of the alphabet, numbers, punctuation marks, and other basic keys.
A peripheral device is any auxiliary device that connects to and works with the computer to either put information into it or get information out of it. Usually, the word peripheral is used to refer to a device external to the computer, like a scanner, but the devices physically located inside the computer are also technically peripherals too. Peripheral devices often aren't directly involved with a computer's main function, but that doesn't mean they aren't considered necessary components.