Computers can be broadly classified by their speed and computing power.
| Sr.No. | Type | Specifications |
| 1 | PC (Personal Computer) | It is a single user computer system having moderately powerful microprocessor |
| 2 | WorkStation | It is also a single user computer system which is similar to personal computer but have more powerful microprocessor. |
| 3 | Mini Computer | It is a multi-user computer system which is capable of supporting hundreds of users simultaneously. |
| 4 | Main Frame | It is a multi-user computer system which is capable of supporting hundreds of users simultaneously. Software technology is different from minicomputer. |
| 5 | Supercomputer | It is an extremely fast computer which can execute hundreds of millions of instructions per second. |