restrictions

n. limitation, state of being restricted; limit, something that restricts

A restriction may refer to:In general usage, a restriction is a specific type of which defines a finite (and generally absolute) boundary defined for a type of process or function.In mathematics, a restriction of a function.In mathematics, a In mathematics, in the context of sheaves, a restriction is a type of function.In business and economics, a restriction is a type of boundary or regulation placed on the trade of certain goods or services.In statistics and econometrics, and most commonly in regression analysis, a restriction is a condition on the variables.in biology, it corresponds to the restriction of the rule of sensibility of bacteria to phages, and therefore corresponds to the means by which the resistance phenomenon occurs : the restriction enzymes.
See more at Wikipedia.org...

Noun
1. a principle that limits the extent of something; "I am willing to accept certain restrictions on my movements"
(synonym) limitation
(hypernym) rule, regulation
(hyponym) quantification
2. an act of limiting or restricting (as by regulation)
(synonym) limitation
(hypernym) regulation, regulating
(hyponym) load-shedding
(derivation) restrict
3. the act of keeping something within specified bounds (by force if necessary)
(hypernym) restraint
(hyponym) classification
(derivation) restrict, restrain, trammel, limit, bound, confine, throttle

n. restriction, limitation; stricture, constriction; constraint, reservation

A bug or design error that limits a program's capabilities, and which is sufficiently egregious that nobody can quite work up enough nerve to describe it as a feature. Often used (especially by marketroid types) to make it sound as though some crippling bogosity had been intended by the designers all along, or was forced upon them by arcane technical constraints of a nature no mere user could possibly comprehend (these claims are almost invariably false).
Old-time hacker Joseph M. Newcomer advises that whenever choosing a quantifiable but arbitrary restriction, you should make it either a power of 2 or a power of 2 minus 1. If you impose a limit of 17 items in a list, everyone will know it is a random number - on the other hand, a limit of 15 or 16 suggests some deep reason (involving 0- or 1-based indexing in binary) and you will get less flamage for it. Limits which are round numbers in base 10 are always especially suspect.
[Jargon File]