SPOTTED: Street Sign in New York City – Sholom Aleichem is a Yiddish writer and also a greeting, Shalom Aleichem:
Hebrew: שָׁלוֹם עֲלֵיכֶם‎ shālôm ʻalêḵem; Yiddish: שלום־עליכם‎ sholem aleykhem) is a greeting version in Hebrew, meaning “peace be upon you”. The appropriate response is “aleikhem shalom”, “upon you be peace”.

Source: Jewish Chick — in New York, New York