Wikipedia Opening Sentences (Inventions)

Instrument used for navigation and orientation that shows direction relative to the geographic cardinal directions.

A mechanical device for applying pressure to an inked surface resting upon a print medium, thereby transferring the ink.

A type of negotiable promissory note, made by a bank, payable to the bearer on demand.

An alloy of iron and carbon, and sometimes other elements.

A device that produces visible light from electric current.

One of two extant subspecies of Equus ferus.

A semiconductor device used to amplify or switch electronic signals and electrical power.

A convex lens that is used to produce a magnified image of an object.

A point-to-point text messaging system, used from the 1840s until better systems became widespread.

A circular block of a hard and durable material at whose center has been bored a circular hole through which is placed an axle.

A device consisting of one or more electrochemical cells with external connections provided to power electrical devices.

A standard set of letters that represent the phonemes of any spoken language.

An ancient calculating tool used centuries before the Arabic numeral system.

A thin material produced by pressing together moist fibres of cellulose pulp derived from wood, rags or grasses.

The earliest known chemical explosive.