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.
Following are few of the important input devices which are used in a computer: 1  Keyboard. 2  Mouse. 3  Joy Stick. 4  Light pen. 5  Track Ball. 6  Scanner. 7  Graphic Tablet. 8  Microphone. 9  Magnetic Ink Card Reader(MICR).