Race: Caucasian Maybe it's cultural bias, but I was really surprised they'd list something like that on an ID card!
Most Singaporeans live in government-owned housing blocks. The distribution of the races within each housing block is roughly the same as in Singapore as a whole. Within these blocks, you are only allowed to sell your apartment to another person of the same race as yourself.
Officially this is to promote "racial harmony." That's probably true. Unofficially, it seems clear that it's also a form of gerrymandering: the government assumes that the Chinese majority will always support the ruling party, and this system stops any district from gaining a Malay majority.
I've also been told that your second language in school (which is taught in English, a neutral language) is determined by your race: Mandarin for Chinese, Malay for Malaysians, and Tamil (!) for Indians.
I really love Singapore -- been there several times as a visitor, studied its governance, society (and its food stalls...) but I would be seriously pissed off if I were told that I had to do certain things because of my race.