Discuss the classification of digital computers.

Digital computers can be classified into four major categories based on their size, power, and functionality:

1. Microcomputers (Personal Computers) — These are small, relatively inexpensive computers designed for individual use. They have a microprocessor, memory (RAM and ROM), and storage devices. Examples: Desktop computers, laptops, tablets, and smartphones.

2. Minicomputers — These are mid-sized computers that are more powerful than microcomputers but less powerful than mainframes. They can support multiple users simultaneously and are used in small to medium-sized businesses. Examples: DEC PDP-11.

3. Mainframe Computers — These are large, powerful, and expensive computers used mainly by large organizations for critical applications, bulk data processing, and large-scale transaction processing. They can handle and process vast amounts of data simultaneously and can support hundreds or thousands of users at once. Examples: IBM zSeries.

4. Supercomputers — These are the most powerful computers in terms of processing capacity and are used for highly complex computations. They are used for scientific and engineering applications, like weather forecasting, nuclear simulations, and complex biological computations. Examples: Cray XT5, IBM Summit.