What are the four types of computers?

A computer system could be divided into four types as mentioned below.

1) Mainframes, Workstations, Servers, PCs.

2) i386 based(x86 and AMD64), ARM based(Raspberry PI), PowerPC based(Macs), Sparc based.

3) Desktop, Laptop, Tablet, Mobile (smartphones).

4) Tower computers, supercomputers like Jaguar supercomputer located inTennessee, USA.