An electronic oscillator is an electronic circuit that produces a periodic, oscillating electronic signal, often a sine wave or a square wave.
Elasticity of supply measures how the amount of a good changes when the producer hires more employees. Elasticity of supply measures how the amount of a good changes when the producer uses new materials. Elasticity of demand measures how the amount of a good changes when its price goes up or down. Elasticity of demand measures how the amount of a good changes when its distribution expands.
Elasticity: A measure of responsiveness of one variable to a change in another, usually defined in terms of percentage change. For example, own-price elasticity of demand is the percentage change in the quantity demanded of a good for a 1% change in the price of that good.