Occam is an actively used programming language created in 1983.

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Example code from the Hello World Collection:

PROGRAM Hello
-- Hello world in Occam
#USE ioconv

SEQ
  write.full.string(screen,"Hello World!")

Example code from Wikipedia:

ALT
   count1 < 100 & c1 ? data
     SEQ
       count1 := count1 + 1
       merged ! data
   count2 < 100 & c2 ? data
     SEQ
       count2 := count2 + 1
       merged ! data
   status ? request
     SEQ
       out ! count1
       out ! count2
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Last updated February 11th, 2019