• 1A Boolean operator which gives the value one if and only if all the operands are one, and otherwise has a value of zero.

    1. 1.1 A circuit which produces an output signal only when signals are received simultaneously through all input connections.
      • ‘It is similarly easy to implement an AND gate with two relays.’
      • ‘An AND gate, for instance, receives two input bits and produces one output.’
      • ‘A vehicular crash discrimination system incorporates first and second crash sensors operatively coupled to a logic AND gate, which activates a safety restraint system.’
      • ‘Using AND gates the researchers can synchronize the time-gated and non-gated signals to within 3 ns.’
      • ‘The AND gate performs a logical ‘and ‘operation on two inputs, A and B.’’


It is still widely taught and believed that conjunctions such as and (and also but and because) should not be used to start a sentence, the argument being that a sentence starting with and expresses an incomplete thought and is therefore incorrect. Writers down the centuries have readily ignored this advice, however, using and to start a sentence, typically for rhetorical effect: What are the government's chances of winning in court? And what are the consequences? Where a number of items are separated by and, the following verb needs to be in the plural: see or A small number of verbs—notably try, come, and go—can be followed by ‘and’ with another verb, as in sentences like we're going to try and explain it to them or why don't you come and see the film? Such structures in these verbs correspond to the use of the infinitive ‘to,’ as in we're going to try to explain it to them or why don't you come to see the film? Since these structures are grammatically odd and, though extremely common, are mainly restricted to informal English, they are regarded as wrong by some and should be avoided in formal standard English. On whether it is more correct to say both the boys and the girls or both the boys and girls, see both