Mainframe:
CPU: 256 cores
Storage size/RAM size : 32 GB
Supercomputer:
CPU: Tens/hundreds of thousands of cores
Storage size/RAM size: 200-300 GB
Minicomputer:
CPU: 2 or more cores
Storage size/RAM size: 128,000 Bytes, or 0.000128 GB
Microcomputer:
CPU: 1 core
Storage size/RAM size: 512 Mb, or 0.512 GB