Business
Elon Musk has served former Twitter boss Jack Dorsey with a subpoena in a hunt for material to help him get out of buying the giant social media platform for $44 billion as agreed.
Aug 22, 2022
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27
Internet
The U.S. has the largest number of surveillance cameras per person in the world. Cameras are omnipresent on city streets and in hotels, restaurants, malls and offices. They're also used to screen passengers for the Transportation ...
Jul 25, 2022
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46
Security
A popular Chinese-made automotive GPS tracker used in 169 countries has severe software vulnerabilities, posing a potential danger to highway safety, national security and supply chains, cybersecurity researchers have found.
Jul 19, 2022
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27
Engineering
A curious thing happened when MIT researchers Adam Vernon and Ronald Garcia Ruiz, along an international team of scientists, recently performed an experiment in which a sensitive laser spectroscopy technique was used to measure ...
Jul 15, 2022
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41
Internet
Twitter said it removes 1 million spam accounts each day in a call with executives Thursday during a briefing that aimed to shed more light on the company's fake and bot accounts as it tussles with Elon Musk over "spam bots."
Jul 7, 2022
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3
Other
When Ellis Monk's wife became pregnant in 2019, the couple became curious about what skin tone their child might have. The subject was of more than passing interest to the sociology professor, some of whose work involves ...
Jul 6, 2022
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4
Consumer & Gadgets
Researchers are pushing to outpace hackers and develop stronger protections that keep data safe from malicious agents who would steal information by eavesdropping on smart devices.
Jun 14, 2022
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110
Business
To many they are art's next big thing—digital images of jellyfish pulsing and blurring in a dark pink sea, or dozens of butterflies fusing together into a single organism.
Jun 12, 2022
1
59
Security
A digital attack on a Massachusetts-based health care organization may have compromised the personal information of as many as 2 million people, officials said.
Jun 8, 2022
0
41
Consumer & Gadgets
Instagram users across the United States will notice a new feature with the popular app.
Jun 8, 2022
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3
A number is a mathematical object used to count and measure. In mathematics, the definition of number has been extended over the years to include such numbers as zero, negative numbers, rational numbers, irrational numbers, and complex numbers.
Mathematical operations are certain procedures that take one or more numbers as input and produce a number as output. Unary operations take a single input number and produce a single output number. For example, the successor operation adds one to an integer, thus the successor of 4 is 5. Binary operations take two input numbers and produce a single output number. Examples of binary operations include addition, subtraction, multiplication, division, and exponentiation. The study of numerical operations is called arithmetic.
A notational symbol that represents a number is called a numeral. In addition to their use in counting and measuring, numerals are often used for labels (telephone numbers), for ordering (serial numbers), and for codes (e.g., ISBNs).
In common use, the word number can mean the abstract object, the symbol, or the word for the number.
This text uses material from Wikipedia, licensed under CC BY-SA
