Digital Electronics
In simplification of a Boolean function of n variables, a group of 2m adjacent 1s leads to a term with

 m – 1 literals less than the total number of variables
 n – m literals
 m + 1 literals less than the total number of variables
 n + m literals

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Digital Electronics
A PROM

 can be programmed only once
 is erasable by ultraviolet light
 is mask programmed
 can be programmed any number of times

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