Question

what is meaning of this 4​

Answer 1

Answer:

A Tandem system typically consists of four processors, twelve discs, a few hundred terminals and their communications gear.  

Explanation:

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Answer 2

1 : a number that is one more than three — see Table of Numbers. 2 : the fourth in a set or series the four of hearts. 3 : something having four units or members: such as.