RTA's and RDA's are both types of RBA. The RTA (Rebuildable Tank Atomizer) is a tank system and the RDA (Rebuildable Drip Atomizer) or RDTA (Rebuildable Dripping Tank Atomizer) is a dripper system. With rebuildables, you "build" your own coil.
Vapefly TGO Biometric Ecig 70w Vape Pod Kit +Opt Coils | FingerPrint Technology
SMOK Solus 2 POD 0.9 Ohm Meshed Replacment Pods 2ml MTL
Uwell Caliburn G2 Pod Pack of 2 | Replacment Coils 1.2Ω Mesh Pack of 4
ASPIRE FLEXUS PRO REPLACMENT POD