Open Hardware designers meet, discuss what they are doing and ask each other for assistance in finding parts, or seek ideas to solve design problems. OH is also an opportunity to exhibit designs, so some may learn from what others have done.
With the rise of reconfigurable logic devices, the sharing of logic designs is also a form of Open Hardware. Instead of sharing the schematics, HDL code is shared. This is different from Open Software. HDL descriptions are commonly used to set up SoC systems either in FPGAs or directly in ASIC designs. HDL modules, when distributed, are called "cores" or "IP" (intellectual property).
Turing machines are extremely basic symbol-manipulating devices which—despite their simplicity—can be adapted to simulate the logic of any computer that could possibly be constructed.
The thesis states that Turing machines indeed capture the informal notion of effective method in logic and mathematics, and provide a precise definition of an algorithm or 'mechanical procedure'.
The concept of a Turing machine was used as an educational tool in the science fiction novel The Diamond Age (1995), by Neal Stephenson.
The winning patterns on slot machines, the amounts they pay, and the frequency at which they appear are carefully selected to yield a certain percentage of the cost of play to the "house" (the operator of the slot machine), while returning the rest to the player during play.
Each slot machine in the group contributes a small amount to this progressive jackpot, which is awarded to a player who gets (for example) a royal flush on a video poker machine, or a specific combination of symbols on a regular or 9 line slot machine.
Typically, machines of similar payback percentages are grouped together, with 1% or less difference from machine to machine in the group.
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