The Old Guard #

Forth #

Forth is probably the most well known “stack-oriented” language. Skipping a lot of the details, this means that you list argument and then the operand. To add 1 + 2 you would write 1 2 +.

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: hello   ." Hello World!" CR ;

There are other stack oriented languages, but today most of them are esolangs - If you want to actually try stack based programming with a modern, not intentionally convoluted syntax check out Factor.

Cobol #

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000100  IDENTIFICATION DIVISION. 
000200  PROGRAM-ID. MFPROG1.     
000300  PROCEDURE DIVISION.      
000400  MAIN-PARA.               
000500      DISPLAY 'HELLO WORLD'
000600      STOP RUN.

From mainframebug.com

https://github.com/azac/cobol-on-wheelchair

Fortran #

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program hello
  ! This is a comment line; it is ignored by the compiler
  print *, 'Hello, World!'
end program hello

Pascal #

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program Hello;
begin
  writeln ('Hello, world.');
end.

BASIC #

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10 PRINT "Hello World!"
20 GOTO 10

Objective C #

One of the less-ancient languages on this list, it’s dead because it was only really used for Apple dev (OS X, iOS), but has been replaced by Apple with Swift.

APL #