Rules of thumb
A rule of thumb is a principle with broad application that is not intended to be strictly accurate or reliable for every situation. It is an easily learned and easily applied procedure for approximat...
Rules of thumb - Wikipedia
Unintended consequences - Unintended Consequences -- Stossel In The Classroom
Everyday, people are killed and injured. When bad things happen, it's natural to say, There should be a law! But what are the unintended consequences of ma...
The Law That Predicts Computing Power Turns 50
Today represents a historic milestone in technology: it's the 50th anniversary of Moore's Law, the observation that the complexity of computer chips tends to double at a regular rate. On April 19th, 1...
Intel’s former chief architect: Moore’s law will be dead within a decade
According to former Intel architect Bob Colwell, the end of Moore's Law is coming, no matter what. Granted, we've heard that before -- but this time, it's for real.
Murphy's law - HotForWords - Murphy s Law!
http://www.hotforwords.com to request words. Murphy's Law! Just who was this Murphy guy anyway?
Murphy's law - Murphy s Law
James Nesbitt as D/S Tommy Murphy.
Amdahl's law
Amdahl's law, also known as Amdahl's argument, is used to find the maximum expected improvement to an overall system when only part of the system is improved. It is often used in parallel computing to...
Carson bandwidth rule
In telecommunication, Carson's bandwidth rule defines the approximate bandwidth requirements of communications system components for a carrier signal that is frequency modulated by a continuous or bro...
Edholm's law
Edholm's law, named for Phil Edholm, says the wireless, nomadic and wired network capabilities will converge. Soon, even slower communications channels like cellphones and radio modems will eclipse th...
Fajans' rules
In inorganic chemistry, Fajans' Rules, formulated by Kazimierz Fajans in 1923, are used to predict whether a chemical bond will be covalent or ionic, and depend on the charge on the cation and the rel...
Fajans' rules - Wikipedia
Five-second rule
In folklore, the five-second rule states that food dropped on the ground will not be significantly contaminated with bacteria if it is picked up within five seconds of being dropped. Some may earnest...
Five-second rule - Wikipedia
Freedman-Diaconis rule
In statistics, the Freedman–Diaconis rule, named after David A. Freedman and Persi Diaconis, can be used to select the size of the bins to be used in a histogram. The general equation for the r...
Gall's law
John Gall (born 1925) is an American author and retired pediatrician. Gall is known for his 1975 book General systemantics : an essay on how systems work, and especially how they fail..., a critique o...
Greenspun's Tenth Rule
Greenspun's tenth rule of programming is an aphorism in computer programming and especially programming language circles that states:This expresses the opinion that the perceived flexibility and exten...
Gustafson's law
Gustafson's Law (also known as Gustafson–Barsis' law) is a law in computer science which says that computations involving arbitrarily large data sets can be efficiently parallelized. Gustafson's Law p...
Gustafson's law - Wikipedia
Haitz's Law
Haitz's law is an observation and forecast about the steady improvement, over many years, of light-emitting diodes (LEDs).It states that every decade, the cost per lumen (unit of useful light emitted)...
Hückel's rule
In organic chemistry, Huckel's rule estimates whether a planar ring molecule will have aromatic properties. The quantum mechanical basis for its formulation was first worked out by physical chemist ...
Lead room
Without lead roomWith lead roomIn photography, filmography and other visual arts, lead room, or sometimes nose room, is the space in front, and in the direction, of moving or stationary subjects. Well...
Lead room - Wikipedia
Markovnikov's rule
In organic chemistry, Markovnikov's rule or Markownikoff's rule describes the outcome of some addition reactions. The rule was formulated by Russian chemist Vladimir Vasilevich Markovnikov in 1870.
Markovnikov's rule - Wikipedia
Moore's law
"Moore's law" is the observation that, over the history of computing hardware, the number of transistors in a dense integrated circuit doubles approximately every two years. The observation is named a...
Naismith's Rule
Naismith's rule is a rule of thumb that helps in the planning of a walking or hiking expedition by calculating how long it will take to walk the route, including ascents. This rule applies only to hik...
Naismith's Rule - Wikipedia
Octet rule
The octet rule is a chemical rule of thumb that states that atoms of main-group elements tend to combine in such a way that each atom has eight electrons in its valence shell, giving it the same elect...
Octet rule - Wikipedia
Okun's law
In economics, Okun's law (named after Arthur Melvin Okun, who proposed the relationship in 1962) is an empirically observed relationship between unemployment and losses in a country's production. The...
Okun's law - Wikipedia
Pareto principle
The Pareto principle (also known as the 80–20 rule, the law of the vital few, and the principle of factor sparsity) states that, for many events, roughly 80% of the effects come from 20% of the causes...
Pie rule
The pie rule, sometimes referred to as the swap rule, is a rule used to balance abstract strategy games where a first-move advantage has been demonstrated. Its use was first reported in 1909 for a gam...
Rock's law
Rock's law or Moore's second law, named for Arthur Rock or Gordon Moore, says that the cost of a semiconductor chip fabrication plant doubles every four years. As of 2003, the price had already reache...
Rule of 72
In finance, the rule of 72, the rule of 70 and the rule of 69.3 are methods for estimating an investment's doubling time. The rule number (e.g., 72) is divided by the interest percentage per period to...
Rule of thirds
The rule of thirds is a principle of the Golden ratio with broad application as a "rule of thumb" or guideline which applies to the process of composing visual images such as designs, films, painting...
Rule of thirds - Wikipedia
Rule of thirds (diving)
In scuba diving, the rule of thirds is a rule of thumb used by divers to plan dives so they have enough breathing gas remaining in their diving cylinder at the end of the dive to be able to complete ...
Rule of twelfths
The rule of twelfths is a rule of thumb for estimating the height of the tide at any time, given only the time and height of high and low water. This is important when navigating a boat or a ship in s...
Rule of twelfths - Wikipedia