Whats the main difference between the coffees named "Kopi O Kosong", "Kopi" and "Kopi Peng"?

Question

How we will differentiate between the coffee that either is it Kopi O Kosong, Kopi or Kopi Peng as all are a form of black coffee?

Answer 1

Hi kopi o kosong is just black coffee without sugar, kopi is coffee with condensed milk and kopi peng is just kopi with ice

Answer 2

Singaporean traditional coffee culture uses a variety of terms originating from Malay, Hokkien, Cantonese etc. Here are the usual terms for kopi:

Term	Meaning	Etymology
Kopi	Coffee with condensed milk and sugar	Malay kopi
[Kopi]-O	Without milk	Hokkien 乌
[Kopi]-C	With evaporated milk	English Carnation
[Kopi] Kosong	Without sugar	Malay kosong
[Kopi] Siew Dai	Less sugar	Cantonese 少底
[Kopi] Ga Dai	More sugar	Cantonese 加底
[Kopi] Peng	Iced	Hokkien 冰
[Kopi] Gau	Strong coffee	Hokkien 厚
[Kopi] Por	Weak coffee	Hokkien 薄
Yuenyeung	Half kopi half tea	Cantonese 鴛鴦

Source: http://www.mysmu.edu/faculty/jacklee/singlish_K.htm