Engineering

Tiny, cheap solution for quantum-secure encryption

It's fairly reasonable to assume that an encrypted email can't be seen by prying eyes. That's because in order to break through most of the encryption systems we use on a day-to-day basis, unless you are the intended recipient, ...

Security

Florida launches investigation into hacking of its servers

Florida officials acknowledged Friday that state servers appear to have been compromised by overseas hackers who gained entry by imbedding malicious code into networking software from a Texas-based software company, SolarWinds.

Electronics & Semiconductors

Tactile tattoos to make virtual worlds tangible

Virtual and augmented reality (VR and AR), often combined under the term 'extended reality (XR)', are increasingly losing their niche status and entering the mass market. Think of the metaverse, gaming, applications in industry ...

Computer Sciences

Transforming transportation with machine learning

You hear the buzzwords everywhere—machine learning, artificial intelligence—revolutionary new approaches to transform the way we interact with products, services, and information, from prescribing drugs to advertising ...

Hardware

Energy-efficient computing with tiny magnetic vortices

A large percentage of energy used today is consumed in the form of electrical power for processing and storing data and for running the relevant terminal equipment and devices. According to predictions, the level of energy ...

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Computer

A computer is a machine that manipulates data according to a set of instructions.

Although mechanical examples of computers have existed through much of recorded human history, the first electronic computers were developed in the mid-20th century (1940–1945). These were the size of a large room, consuming as much power as several hundred modern personal computers (PCs). Modern computers based on integrated circuits are millions to billions of times more capable than the early machines, and occupy a fraction of the space. Simple computers are small enough to fit into a wristwatch, and can be powered by a watch battery. Personal computers in their various forms are icons of the Information Age and are what most people think of as "computers". The embedded computers found in many devices from MP3 players to fighter aircraft and from toys to industrial robots are however the most numerous.

The ability to store and execute lists of instructions called programs makes computers extremely versatile, distinguishing them from calculators. The Church–Turing thesis is a mathematical statement of this versatility: any computer with a certain minimum capability is, in principle, capable of performing the same tasks that any other computer can perform. Therefore computers ranging from a mobile phone to a supercomputer are all able to perform the same computational tasks, given enough time and storage capacity.

This text uses material from Wikipedia, licensed under CC BY-SA