portable - small enough to be easily carried or moved, invention - something that has never been made before, or the process of creating something that has never been made before, signal - an action, movement, or sound that gives information, a message, a warning, or an order, exoskeleton - a hard outer layer that covers, supports, and protects the body of an invertebrate animal such as an insect or crustacean, bionic - using artificial materials and methods to produce activity or movement in a person or animal, interface - a connection between two pieces of electronic equipment, or between a person and a compute, 3d - three dimensional, nanobots - an extremely small robot (= a machine controlled by a computer that can do things automatically), biomechanics - the physical forces that affect human and animal movement, or the study of these forces :, limbs - arms and legs of a person or animal, wireless - using a system of radio signals rather than wires to connect computers, mobile phones, etc. to each other, streaming - the activity of listening to or watching sound or video directly from the internet:, download - to copy or move programs or information into a computer's memory, especially from the internet or a larger computer, cassette - a flat rectangular device containing a very long strip of magnetic material that is used to record sound and/or pictures, or a machine that uses such devices, CD - compact disk, battery - a device that produces electricity to provide power for radios, cars, etc., charger - a device that is used to recharge a battery (= fill it with electricity), for example in a mobile phone,

technology unit 7a

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