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YouTube is a web-based video streaming and sharing service, and social network. It launched in 2005 and quickly gained immense popularity, being bought by Google shortly after in 20006. Services have since been expanded to include live streaming.

An astronomer is a scientist who studies celestial bodies such as moons, planets, stars, nebulae, and galaxies); the physics, chemistry, and evolution of such objects; and phenomena that originate outside the atmosphere of Earth. A related but distinct subject, cosmology, is concerned with studying the universe as a whole.

A space-time crystal or four-dimensional crystal is a theoretical structure periodic in time and space. It extends the idea of a crystal to four dimensions. The idea was proposed by Frank Wilczek in 2012. His speculation was that a construct would have a group of particles that move and periodically return to their original state, perhaps moving in a circle, and form a time crystal. In order for this perpetual motion to work, the system must not radiate its rotational energy. This type of motio...

Software that is intentionally hostile or intrusive, often designed to cause data breach or damage to a computer resource

Mac OS is a series of graphical user interface-based operating systems developed by Apple Inc. for their Macintosh line of computer systems. The original version was the integral and unnamed system software first introduced in 1984 with the original Macintosh, and referred to simply as the System software. This is credited with popularizing the graphical user interface concept. Mac OS releases have existed in two series, Classic Mac OS from 1984 to 2000 and Mac OS X from 2001 to present.

Software engineering (SE) is the application of a systematic, disciplined, quantifiable approach to the design, development, operation, and maintenance of software, and the study of these approaches; that is, the application of engineering to software. In laymans terms, it is the act of using insights to conceive, model and scale a solution to a problem.

An air taxi is an air charter passenger or cargo aircraft which operates on an on-demand basis. In 2001, Air taxi operations were popularized in the United States by a NASA and aerospace industry study on the potential Small Aircraft Transportation System (SATS) and the rise of light-jet aircraft manufacturing.

The Internet is a global system of interconnected computer networks that use the standard Internet protocol suite (TCP/IP) to serve billions of users worldwide. It is a network of networks that consists of millions of private, public, academic, business, and government networks, of local to global scope, that are linked by a broad array of electronic, wireless and optical networking technologies.

A programmer, computer programmer, developer, coder, or software engineer is a person who writes computer software. The term computer programmer can refer to a specialist in one area of computer programming or to a generalist who writes code for many kinds of software. One who practices or professes a formal approach to programming may also be known as a programmer analyst.

The MacBook Air family is a line of ultraportable Macintosh notebook computers created by Apple Inc. The Air was designed to balance both performance and portability, the laptop has a full-sized keyboard design with a machined aluminium casing with extremely low weight and thickness. The MacBook Air is available in two sizes: 11.6 inch and 13.3 inch (or 29.46 cm and 33.78 cm, respectively). The measurement refers to the diagonal display size.