A Central Depository account (CDP) safekeeps the securities that you purchase. This includes stocks, bonds and other securities listed on the Singapore Exchange (SGX), as well as Singapore Government Securities. A CDP account is required for you to buy and sell shares on the SGX.
Brokerage accounts can be CDP-linked, particularly for stocks on the SGX, whereby the stocks purchased under your name will be credited into your CDP account. You can have multiple brokerage accounts linked to your CDP account.