eMMC embedded MultiMediaCard
"SD card on the motherboard" — cheap flash storage for budget phones, Chromebooks, IoT devices.
A BGA package with NAND flash + controller, soldered directly to the PCB. Standardised by JEDEC. Maxes out around 400 MB/s with eMMC 5.1 (2015), which is slow next to UFS or NVMe. Lives on in the Raspberry Pi 5, cheap Android tablets, smart TVs, infotainment. eMMC has no headroom left for modern mobile workloads — UFS took over from 2016 onward.