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The mechanical clock comprises an oscillating mechanism that marks the passing of time, and an escapement that counts its beats
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Paper is a thin sheet material produced by mechanically and/or chemically processing cellulose fibres derived from wood, rags, grasses or other vegetable sources in water, draining the water through fine mesh leaving the fibre evenly distributed on the surface, followed by pressing and drying
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In electricity generation, a generator[1] is a device that converts motive power, into electrical power for use in an external circuit.
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The invention of radio communication, although generally attributed to Guglielmo Marconi,spanned many decades and involved many people.
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An X-ray, or X-radiation, is a penetrating form of high-energy electromagnetic radiation. X-ray wavelengths are shorter than those of UV rays and typically longer than those of gamma rays.
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is the technique and art of creating and projecting footage Etymologically, the word «cinematography» was a neologism created at the end of the 19th century and composed from two Greek words:
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is a telecommunication medium used for transmitting moving images in monochrome,or in color, and in two or three dimensions and sound. The term can refer to a television set, a television show, or the medium of television transmission.
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Radar is a detection system that uses radio waves to determine the range, angle, or velocity of objects.
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A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.
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Electronic mail (email or e-mail) is a method of exchanging messages ("mail") between people using electronic devices.
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is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area.
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Microsoft Windows, commonly referred to as Windows, is a group of several proprietary graphical operating system families, all of which are developed and marketed by Microsoft
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is a digital optical disc storage format invented and developed in 1995 and released in late 1996. The medium can store any kind of digital data and is widely used for software and other computer files as well as video programs watched using DVD players. DVDs offer higher storage capacity than compact discs while having the same dimensions.
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A hybrid vehicle uses two or more distinct types of power, such as submarines that use diesel when surfaced and batteries when submerged.
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is a family of wireless network protocols, based on the IEEE 802.11 family of standards, which are commonly used for local area networking of devices and Internet access. Wi‑Fi is a trademark of the non-profit Wi-Fi Alliance, which restricts the use of the term Wi-Fi Certified to products that successfully complete interoperability certification testing.[
