The Substrate — Assembly
The contract every other piece in this collection signs invisibly. Beneath Fortran's WRITE, BASIC's PRINT, Python's print, JavaScript's document.write, Java's println, and COBOL's DISPLAY lies this same handful of moves: load the syscall number into eax, the file descriptor into ebx, fire int 0x80. The numbers are not symbolic — 4 is literally sys_write and 1 is literally stdout, indices into a kernel table whose ordering has not changed since Linus Torvalds posted the first kernel to comp.os.minix on 25 August 1991.