HDD Partitions

My new Inspiron 15 7000 series 500 Gb HDD has four petitions; 1. EFI System Partition - 500MB 100% free space; 2. Recovery Partition - 450MB 100% free space; 3. Recovery Partition - 11.09GB 100% free space; 4. OS(C) drive 453.62GB with 63% free space. I am using Windows10.

My question is what are the first three partitions for. On my old Vista laptop there was a 10GB recovery drive (D). On this new laptop the first thing I did was create a USB Recovery drive so I am not sure what the partitions are for.

Geoff