[ehPReth]

Word v1.1a:

    $ grep -ri fuck .
    ./Opus/asm/wordgrep.asm:; BP  is used as always, the other registers are free to fuck with.
    ./Opus/asm/wordgrep.asm:	je	another_fucking_out_of_range_jump
    ./Opus/asm/wordgrep.asm:another_fucking_out_of_range_jump:

MS-DOS v1.1 & v2.0:

    $ grep -ri fuck .

[not_that_noob]

MS-DOS would have been delivered to IBM as code, so they cleaned it up for the suits. Word on the other hand...