To what standards are today's(and/or yesterdays) A/C engines corrected to???

I find the older SAE J607--60°F---29.92" Hg 0% humidity
SAE J1349--77°F 29.234"Hg 0%
DIN 68°F 29.92
JIS 77°F 29.234 0%
?? J1995 77°F 29.53 0%
(29.53"Hg = 100KPa )


My guess is that it is the older J607--,but I'd like a 2nd opinion.

Thanks a Whole bunch--Jerry