Each seed packet has "Ss" marked on it which stands for "Seed Source." The Seed Source is followed by another set of initials which stand for the seed company. You can visit the seed company and find out more information about your varieties! The seed companies are as follows:
NSS: Native Seed/SEARCH
SS: Siskiyou Seeds
SSE: Seed Savers Exchange
ST: Seeds Trust
BSPC: Burgess Seed and Plant Co.
TS: True Love Seeds
BCHS: Baker Creek Heirloom Seeds
Community: Community grown!