A micro-PC is a very small form factor PC. They are small enough to where they can be mounted on the back of the monitor with a VESA mount. With that being said, they will be very limited in the capabilities they have. These systems might be rational for home use where many are likely to have their own notebook PC, and this is just a standby PC. The micro PC must support 1 SODIMM for a maximum of 64GB of memory. They must have one 2230 NVME slot. Even though they are small, they should be able to still be accessible for upgrades, and repairs. For rear ports, there must be at least 4 USB, and 1 RJ45-1GBPS. For the front, there must be 2 USB ports, and an SDXC card reader. Ideally, the micro-PC will sit in front of or under the monitor since the card reader should be easily accessible.