The four main categories are CMIO (Chinese, Malay, Indian and others), and these reflect racial markers that have been used to share policies in the areas of education, housing and welfare. This categorization was necessary in our early nation building days to bring different communities together. This categorisation has been revised to reflect increasing diversity in Singapore. On 1 January 2011, both parents of different races, example 'Indian-Malay' for a child born to Indian and Malay parents, where the races of both parents are reflected in the child's race. This is reflected in their National Registration Identity (NRIC)