Abbreviations used in pavement design

[himanshu1]

hi,
I am in India & while using a software called REI-HEADS,can anybody tell me what does these abbreviations stand forin AASHTO's flexible pavemnt design: ANP,STA,PER,OSA,STD,ZR,PS1,DPE,SNo.
or can anybody suggest me of site where i can get explanations about these AASHTO short forms

 

[BigH]

Perhaps these are the program's own short-forms rather than AASHTO's. I've not seen the above in AASHTO Documents that I've used.