When bytes are combined, they can represent data, computer instructions, and information. Bits are not read one at a time, but they are combined to form words. A Word is a number of adjacent bits that are grouped in multiples of eight and that can be manipulated as a unit. The bigger the word, the faster the manipulation. Laptop personal computers allow portability and provide an even more convenient access to computer hardware and software.
Minicomputers are a bit larger than PCs.
They are used for mostly business applications and to create small networks. Minicomputers were widely used back in the 1980s. Mainframes are usually used in large corporations for large-scale computer applications. Mainframe computers process very fast, support multiple operating environments, can process many different tasks simultaneously, as well as support many users at the same time. These computers are much more expensive and are primarily used for business applications.