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s23
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Binary Bi"na*ry, a. [L. binarius, fr. bini two by two, two at

  a time, fr. root of bis twice; akin to E. two: cf. F.
  binaire.]
  Compounded or consisting of two things or parts;
  characterized by two (things).


{Binary arithmetic}, that in which numbers are expressed

     according to the binary scale, or in which two figures
     only, 0 and 1, are used, in lieu of ten; the cipher
     multiplying everything by two, as in common arithmetic by
     ten. Thus, 1 is one; 10 is two; 11 is three; 100 is four,


{Binary star} (Astron.), a double star whose members have a

     revolution round their common center of gravity.

Binary Bi"na*ry, n.

  That which is constituted of two figures, things, or parts;
  two; duality.


binary

  1. <mathematics> {Base} two.  A number representation
  consisting of zeros and ones used by practically all computers
  because of its ease of implementation using digital
  electronics and {Boolean algebra}.
  2. <file format> Any file format for {digital} {data} encoded
  as a sequence of {bit}s but not consisting of a sequence of
  printable {characters} ({text}).  The term is often used for
  executable {machine code}.
  Of course all digital data, including characters, is actually
  binary data (unless it uses some (rare) system with more than
  two discrete levels) but the distinction between binary and
  text is well established.
  3. <programming> A description of an {operator} which takes
  two {arguments}. 


This also refers to executable files in Unix-based systems.


There are only 10 types of people in the world, those who understand binary and those who don`t.