What does 'DP name' means in an IPO online form?

DP stands for depository participants. There are 2 depository participants in India: CDSL and NSDL. 'DP name' in an online form means whether your account is created with CDSL and NSDL. You can identify your DP name by the 16 digit DP number. CDSL has 16 digit ID number while for NSDL, its an alphanumeric combination with first 2 alphabets and the rest 14 digits.