Is it an abbreviation or is it used instead "A-Z"?
I have seen it being used multiple places:
- E-Z cook oven
- E-Z Hiscores
It means 'easy'. The two sounds for those letters in the (American) English alphabet sound out the word easy.
"E-Z" is a lazy way to write the word easy. This is in American English because the letter z is pronounced as "zee" in America. This does not apply in British English because the letter z is pronounced as "zed".