Amdahl's Law - "The speed-up of a program using multiple processors in parallel computing is limited by the time needed for the sequential fraction of the program."
Brooks's Law - "Adding manpower to a late software project makes it later."
Clarke's Three Laws
- When a distinguished but elderly scientist states that something is possible, he is almost certainly right. When he states that something is impossible, he is very probably wrong.
- The only way of discovering the limits of the possible is to venture a little way past them into the impossible.
- Any sufficiently advanced technology is indistinguishable from magic.
Classen's Law - "In order to achieve a linear improvement in usefulness over time it's necessary to have an exponential increase in technology over time." Or more succinctly:
Usefulness = log(Technology)
Conway's Law - "Any piece of software reflects the organizational structure that produced it."
Gall's Law - "A complex system that works is invariably found to have derived from a simple system that worked."
Gates's Law - "The speed of commercial software generally slows by fifty percent every 18 months thereby negating all the benefits of Moore's Law."
Gilder's Law - "Bandwidth grows at least three times faster than computer power."
Goodheart's Law - "When a measure becomes a target, it ceases to be a good measure."
Greenspun's Tenth Rule of Programming - "Any sufficiently complicated C or Fortran program contains an ad hoc, informally-specified, bug-ridden, slow implementation of half of Common Lisp."
Gustafson's Law - "Any sufficiently large problem can be efficiently parallelized."
Hofstadter's Law - "It always takes longer than you expect, even when you take into account Hofstadter's Law."
Kerckhoffs' Principle - "A cryptosystem should be secure even if everything about the system, except the key, is public knowledge."
Knuth's Law - "We should forget about small efficiencies, say about 97% of the time: premature optimization is the root of all evil."
Kranzberg's Six Laws of Technology
- Technology is neither good nor bad; nor is it neutral.
- Invention is the mother of necessity.
- Technology comes in packages, big and small.
- Although technology might be a prime element in many public issues, nontechnical factors take precedence in technology-policy decisions.
- All history is relevant, but the history of technology is the most relevant.
- Technology is a very human activity - and so is the history of technology.
Metcalfe's Law - "The value of a system grows as approximately the square of the number of users of the system."
Moore's Law - "The number of transistors that can be inexpensively placed on an integrated circuit doubles roughly every two years."
Norvig's Law - "Any technology that surpasses 50% penetration will never double again (in any number of months)."
- Work expands so as to fill the time available for its completion.
- Data expands to fill the space available for storage.
- Programs expand to fill all available memory.
Proebsting's Law - "Compiler advances double computing power every 18 years."
Reed's Law - "The utility of large networks, particularly social networks, can scale exponentially with the size of the network.
Schneier's Law - "Any person can invent a security system so clever that she or he can't think of how to break it."
Wirth's Law - "Software gets slower faster than hardware gets faster."
Zawinski's Law - "Every program attempts to expand until it can read mail. Those programs which cannot so expand are replaced by ones which can."