What do vendors do?

for PCI vendors try this site: http://www.pcidatabase.com/

a street vendor is like a many store on the srteet where you can either buy ice cream fruits and more.......

Seriously, that makes no sense at all. If you want the definition of vendor, it's somebody that sells something. Or, do you mean what does somebody mean by vendor? If so, please provide the context....

A "vender's lien" is a mortgage in favor of the person who sold the property to you. You must pay the lien. You must get the creditor to agree to subordinate their lien to your new mortgage.

look it up on the internet and apply for the job!