Malware history was: Spectre & Meltdown

Paul Koning paulkoning at
Wed Jan 17 18:34:35 CST 2018

> On Jan 17, 2018, at 6:55 PM, Fred Cisin via cctalk <cctalk at> wrote:
>>> I used to have a tiny portable manual card punch.
>>> An acquaintance used it to punch /* in the first two columns of his
>>> punchcard based utility bills.   (those characters have special meaning
>>> to 360 JCL.  They have multiple punches per column, so it required
>>> making a punch, then backspacing to make the other punch(es))
> On Wed, 17 Jan 2018, Chuck Guzis via cctalk wrote:
>> /* = end of data set
>> /& = end of job
>> One wonders how a S/360 "C" compiler might deal with this. Preceding it
>> with a space might do the trick.
> Yes, it would, but how would you get 100% compliance wiht no mistakes from PROGRAMMERS?
> A 360 s'posedly COULD be told to ignore, or to respond to something else, but that wasn't usually available.

// DD DATA would ignore // in cols 1,2, but not /*.  I found // DD DATA,DLM='@@' -- not sure when that appeared.  I don't remember it from my OS/360 dabblings.


More information about the cctalk mailing list