[lsh123]

I am not familiar with A/B/C/D levels but PCI spec clearly defines PCI 1-4 levels based on volume/number of payments:

http://www.pcicomplianceguide.org/pcifaqs.php#5

[airlocksoftware]

Ah, yes. What I'm talking about above applies to level 4 merchants, (less than 20k ecommerce transactions), who can get away with lower level compliance. The ABCD levels refer to the self assessment questionnaires (SAQ) these level 4 merchants are required to completed.

https://www.pcisecuritystandards.org/security_standards/docu...

[lsh123]

I guess I never bothered to look at anything below level 1 :)