Final answer:
Computer systems can be categorized by their physical hardware, programming capabilities, and user interfaces. The development of personal computers opened up new applications in various fields, greatly impacting communication and information management. Technologies like the Internet and GPS have further revolutionized global connectivity.
Step-by-step explanation:
The categorisation of computer systems can be understood by examining their functionalities and their areas of application in real-world scenarios. On a physical level, a computer is seen as a series of electronic changes. From an engineering perspective, this involves the intricate hardware components that enable the device to operate. From a programmer's standpoint, known as the design level, a computer runs programs developed to perform specific tasks. And at a commonsense level, the user interacts with the computer through applications for various purposes such as word processing or solving equations.
The development of computers has dramatically changed the way we communicate and handle tasks. In the late 1970s and early 1980s, with manufacturers like Apple and Commodore offering personal computers, the accessibility of computing technology broadened, leading to increased use in business and the home. Applications have expanded to include controlling machines and performing complex computations in fields such as engineering, science, and meteorology.
In terms of global impact, computers and communication networks have significantly influenced world culture and politics. Information technologies like the Internet, GPS, and GIS have revolutionized the way we share information, navigate, and interpret geographical data. Such advancements have facilitated global connectivity, transforming education, business, and entertainment.